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Duramax idle surge when cold

Jun 19, 2012 · I have a 2000 Chevy Silverado 2500 with a 6.0-liter V-8. It's hard to start when cold. I have to crank it for a while, and it runs rough and stalls for about 15 minutes after that. Read more about ... no cold startup issues. with the ac off, the idle is rock solid at around 600 rpm. with the ac on (and it gets worse with the fan speed turned higher, i.e. worse at with max a/c) the car occassionally jolts and i can see the rpms bounce up by a couple...Jun 19, 2012 · I have a 2000 Chevy Silverado 2500 with a 6.0-liter V-8. It's hard to start when cold. I have to crank it for a while, and it runs rough and stalls for about 15 minutes after that. Read more about ... Sep 25, 2009 · When cold, or sitting overnight only, vehicle starts up fine, however has rough idle, loud exhaust vibration sounds in interior, is worse in reverse backing out of driveway. Symptoms totally disappear after vehicle warms up. 6 visits to the shop and still unable to diagnose or repair. They state they have checked the forums. Jan 13, 2009 · surges cold idle MB Sponsored Link. Share Remove Report: Sam Anselmo. MB idle cold surges. Back to top: Mon Jan 19 2009 2:44 am Re: 1994 MB 300 idle surges when cold ... Jan 06, 2017 · 1997 Ford Ranger 4.0 OHV. I have this surging idle issue that's been going on for about 4 years. I was also having the p0171/p0174 CEL issues and replacing parts that have failed. The truck has 200k miles on it. Fuel pump replaced on failure. Fuel filter replaced. IAC replaced (3 times). 2002 Dodge Ram 2500 5.9L Poor Idle Quality, Hesitation, Surge, Cuts out Posted to Chrysler Driveability on 3/14/2012 7 Replies Hi Guys This one is a head scratcher.

Hey, I got a 95 Acura Integra LS and some reason I have a high/surging idle on cold startups. It will Idle between 1500-2500 rpm and surge until the car is warmed up then drop off and idle normally. When I plug up the IAC hole inside my throttle body a little bit the idle gets much better. Jan 11, 2017 · Q: Hi Chris, I have a 2008 audi a4 2.0T Quattro with about 181,000 km on it. The problem that I am experiencing is engine surging. The surging is bad when the engine is cold and not at optimum running temperature. Nov 03, 2002 · My buddy's Chevy Duramax has an rpm surge at idle, so much so that when stopped in "drive", the truck lurches if you're not standing on the brake pedal. He's had it back to the dealer, was told "They do that". It doesn't seem very safe to me or my buddy, and makes maneuvering in tight quarters interesting to say the least. Dec 19, 2013 · If its still holding pressure by morning on a cold engine there is more than likely not a leak either. The radiator cap or surge tank cap in your case is set to vent at a set pressure. Get a radiator cap "surge tank cap" and fill the coolant up starting with a cold engine.

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Timing is set correctly. As far as I know, thefuel/air (CO) level is correct. When starting cold, the engine surgesfrom 2000 rpm to almost zero and does sometimes die. If I add someaccelerator pedal, it will run smoothly around 1500 rpm. After a fewminutes, it runs fine on its own. I get no surging after that point.
Surging idle could be many things. I'd look for vacuum leaks with a smoke machine (you can build one for cheap) first. Also, you may look at your blue coolant sensor. If this is reading low, your engine will overfuel thinking it needs to warm up the engine but your O2 sensor will see that it's running rich so it'll try to adjust. Back and forth, etc.
Idle jumps up 50-100 rpm. Sometimes at a stoplight in gear and truck wants to lunge forward. All systems check out except the FICM. (44-46v) on cold start up. Goes up to 48v occasionally. Brand new (reman) injectors. Brand new icp sensor and pigtail. Truck is running 100% better than a week ago prior to injectors.
1994-1997; 50 psi at idle and 55 psi at WOT 1999-2003; 50 psi at idle and 45 psi at WOT 2. Aeration in the oil. CHIRP OR COMPRESSOR SURGE AT SHIFT POINTS When a 99.5 to 2003 has been "hopped up" it can cause the compressor wheel to chirp or surge at higher boost levels (25 psi or so).
Sounds like intake manifold gaskets. I just had to replace mine on my o2. Too much air intake while cold making it surge. Gaskets/intake seal once everything warms up. Mine seemed to do it under 30 degrees. I also changed out my knock sensors while in there. It took me approximately 3 hours from start to finish. I was taking my time as well.
surging idle I'm having the same problem with my 06' GT. It started surging to almost 3000rpm and lagging down to 400rpm. When I took it to my mechanic they said they just cleaned the throttle body, it ran fine after that until now, that was 5000 miles ago. So now at 40k miles it's doing it again only rougher this time.
Mar 18, 2011 · I recently bought a 2002 GMC sierra with the 6.6 LB7 and the truck surges at idle when its in park or in drive. I have tried the fuel additive Diesel Kleen didnt have much affect on the surge. From visual inspection the fuel lines seem fine. The truck has a fairly strong diesel fuel smell in the exhaust but does not smoke at all.
2004 Chevy 6.6 Diesel Surge at Idle. I have a 2004 Chevy Duramax 6.6 that has developed at surge at idle. started very light but I currently get a constant surge of approx. 200 rpms about every 3 to 4 seconds. No surge on cold start, but once it warms to operating temp. the surge begins. Can be felt slightly while driving.
Apr 08, 2016 · It jammed it to a "stuck open" position, causing a massive vacuum leak, and making the engine "idle-hunt" or "idle-surge". It's when the engine, at idle, runs extremely lean and the engine would go "rawr, rawr, rawr" every second as it revs up between 1,000 to 4,000 RPM depending on severity. 3. I have class tomorrow.
1. Remove the surge tank cap (2). 2. Using a 50/50 mixture of GM Dex-cool antifreeze and water, slowly fill the pressurized side (3) of the surge tank until the system is full of coolant. 3. With the surge tank cap removed, start the engine and race it to 2,000 -2,500 RPM until the engine reaches normal operating temperature.
Apr 05, 2011 · From personal experience excessive cold start enrichment will cause the idle to surge (oscillate) when first starting. Since the enrichment is commanded by the PCM from a look-up table and you can't change it without a chip that would lead me to think that a sensor is giving the PCM some bad data.
Re: 1997 Ocen Pro 200 - rough idle cold and surges every once in a while Well, a test of the idle and max spark timing is in order. Check the condition of the spark plugs. Also, carbs get dirty over time. You can try some Seafoam (see sticky for procedure), and also give the idle orafices a blast of gumout.
Jun 14, 2013 · So, the truck was still acting terrible at idle. After keying it on, it'd go through it's 2 second warm up RPMs then promptly drop to a very low RPM, surging for a balance till it would ultimately die within just a few seconds sometimes longer. I've since replaced the spark plugs and wires, distributor cap and rotor button, and alternator.
Now that it's getting colder in the Midwest have any of you experienced your idle bouncing on cold starts for the IS250? It does not do it immediately when you start the car but after 2-3 minutes the idle will actually go up just slightly and bounce up...
No idle surge when cold start. As soon as it warms up it develops a small surge, you can also feel the surge when driving,smokes alot when surge happens while driving, any ideas? Injectors checked out good, fuel pressure regulator also seemed to be in spec.
Nov 29, 2020 · A surge is usually caused by a fuel system management or drivetrain operation failure. When an engine's computer can "hunt" or "surge" at cruising or idle speeds it is searching for program compliance, there is a problem elsewhere in the system.
Duramax Diesel Engines The AERA Technical Committee offers the following information on high oil pressure at start-up on 2017-2018 GM 6.6L, L5P Duramax diesel engines. Reports have been filed that the oil pressure gauge “pegs” or goes as high as it can when this engine first starts when cold.
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The idle until she gets hot is steady with no stumbling or surging. As always it is refreshing to come here and read all the helpful posts. Check all vacuum hoses for leaks. If its sucking in to much air the eco will be throwing its rattle out of the pram. I think when its cold the ECU over compensates anyway.
May 24, 2009 · GM Duramax Engines. 04.5-05 LLY ... Loping or surging at idle...it seems like my truck has a big cam in it. ... You would slowly back up but the surge would just rush ...
Oct 10, 2011 · idle surge, running rough, guzzling gas - 88 Ranger Was searching the interwebs, landed on that thread, unfortuantly it's like a 2003 Ranger.. 88 Ranger Auto, 2.9 EFI - Bought it this weekend.

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Dec 06, 2007 · - Engine usually runs smooth at cold idle. But not for long - maybe a minute or so. - When at idle engine will alternate between running smooth and then stumbling and slowing down. Seems like the ECU is trying to keep it from stalling. Whole car will tremble. - Lower RPM has limited power/torque. Once you get to 3000 RPM or so it pulls much better. Mar 22, 2009 · The car runs fine when cold but once heated up idles at 1000 RPM, misses intermittently (light or hard acceleration), sometimes real bad and surges on light pedal pressure. I have a P0507 which is high idle. Engine surges, up and down, when cold, from about 1,000 rpm to 2,000 rpm. Possibly related, when using cruise control, engine gradually speeds up to about 75 MPH, then drops back to set speed, then speeds up again. Tapping the 'lower speed' button slows it down, but it starts climbing again. - 1994-1997 Honda Accord Hello, I know there are other posts about the surging idle issue and I am just wondering if Fuel pressure regulator is probably what is wrong with my I recently bought a 2002 GMC sierra with the 6.6 LB7 and the truck surges at idle when its in park or in drive. I have tried the fuel additive Diesel...Nov 11, 2006 · 1994 z71,350 TBI surging idle when cold..... I have a 1994 Chevy z71 with a gm crate motor that has about 30k on it I am having low idle problems, surging2-800 rpm or so, very low Jan 13, 2009 · surges cold idle MB Sponsored Link. Share Remove Report: Sam Anselmo. MB idle cold surges. Back to top: Mon Jan 19 2009 2:44 am Re: 1994 MB 300 idle surges when cold ... After sitting long enough to cool down, the engine starts, idles normal. If the car is shut off for a few minutes, when its started again the idle surges from around 1000-2000 about 4 or 5 times and smooths out just fine, or if you drive off the idle goes down to the normal 800 or so.

Apr 20, 2020 · If you experience cold starting problems, stalling at idle, or hesitations during acceleration, it may be the idle air bypass valve. This valve helps the vehicle idle steadily and run when the accelerator pedal is not pressed. 126 people reported this problem 35 comments Aug 28, 2015 · An idle surge can be caused by multiple phenomena. If an engine is not getting enough fuel (this is called “running lean”), due to fuel pressure (regulated by the fuel pump and regulator ...

Aug 08, 2011 · Surge at idle when warmed up. 7.3 Tech. CPS was replaced a couple of years ago. This feels nothing like it did when the CPS went out. The Duramax V8 engine is a General Motors Diesel V8 engine family for trucks. The 6.6-liter Duramax is produced by DMAX , a joint venture between GM and Isuzu in Moraine, Ohio . The Duramax block and heads are poured at The Defiance GM Powertrain foundry in Defiance County, Ohio . Jul 17, 2018 · On cold start it starts instantly and when running on fast idle its very smooth. As it warms up (within 1 min) and the idle drops to normal the idle becomes very eratic and surges up and down. Eventually it just stalls unless I feather the peddle.

When the engine is cold the engine shrinks which unseals the intake and allows a small amount of unregulated air into the engine causing it to idle rough. as Generally, when there is a problem with the air control valve it causes the idle to become erratic and 'hunt' and maybe the engine keeps stalling.Oct 31, 2011 · Curious as im fighting the rough idle after a steering column rebuild. Going to scan today with a Matco Pro Scan Plus tool hoping to find the issue. TRS is adjustable .. "Ok wierd! I am having the same problem, supper glad I stumbled on to this thread. I too had my steering column rebuilt, now my :ford: 7.3 E350 is surging on idle. Mar 02, 2005 · The Duramax 6600 delivers 250 horsepower (186 kw) and a class-leading 460 lb.-ft. of torque (624 Nm). ... particularly at idle, are traits designed into the Duramax 6600. They've been enhanced in ... 6 hours ago · BD-Power Cool-It Intercooler 06-10 6. 6L Poor Idle Quality, Surge Posted to GM Driveability on 5/22/2007 11 Replies DURAMAX PEOPLE HELP! dont work on these everyday, engine idle seems to jump up 200 RPM every 10 seconds or so.

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Apr 20, 2020 · If you experience cold starting problems, stalling at idle, or hesitations during acceleration, it may be the idle air bypass valve. This valve helps the vehicle idle steadily and run when the accelerator pedal is not pressed. 126 people reported this problem 35 comments
During cold startup on some systems, an auxiliary air regulator admits additional air into the intake manifold to increase the idle speed. When the engine is warming up, it is necessary to increase the idle speed to prevent stalling... When the choke is on, the fast idle cam swings out in front of the idle...
Hello, I know there are other posts about the surging idle issue and I am just wondering if Fuel pressure regulator is probably what is wrong with my I recently bought a 2002 GMC sierra with the 6.6 LB7 and the truck surges at idle when its in park or in drive. I have tried the fuel additive Diesel...
Cold Start Idle Surge - 2.8L Duramax. Jump to Latest Follow 1 - 3 of 3 Posts. kevinatfms · Registered. 2017 Colorado Z71 Duramax Joined 3 mo ago · 18 Posts ...

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- it tends to idle & drive fine for 1st minute when the car is completely cold, the second some heat is coming in it goes into the surging mode when idling or no power when driving, I'm guessing it's because for first minute the ECU is ignoring whatever is making it flip out short time later.
2002 duramax smoking at idle - Cars & Trucks. Posted by dwight gee on Apr 05, 2017. Want Answer 1. Clicking this will make more experts see the question and we will ...
May 13, 2008 · They said that it was hunting for the idle speed. By that they meant that the ecm would sense to low of an idle and then when it saw to high of an rpm it would send less fuel, so it was hunting for the correct idle. once they backed the rpm down at idle it went away. My truck was worse when it was cold outside.
Check your idle. If it is too high, it will cause the surging when the brake is pressed. I had the same problem; my high idle was from a sticking dashpot. If you search previous threads for surging idle you will find more information.
Mar 22, 2009 · The car runs fine when cold but once heated up idles at 1000 RPM, misses intermittently (light or hard acceleration), sometimes real bad and surges on light pedal pressure. I have a P0507 which is high idle.
Mar 25, 2008 · I have a 2004 duramax which surges at idle. If let idle for 15-20 minutes it wull throw a p0087 code and not run above idle. 180,000 miles and stock. fuel additive help mask the problem most of the time. Fuel filter changed every 10 - 20 thousand miles. Began doing this 80 thousand miles ago.
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The engine starts fine when cold and idles steady (about 900-1000 RPM), but when it warms up it surges from 1000-1400 in a very steady pattern. I didn't have this issue until recently (I noticed it a few days ago).
Problem solved! The key was to finally locate the source of OBDII code PO 0171, left bank lean, which I realize was not part of my original question. Anyways, I found a leaky air hose connection between the manifold and the MAF, once I corrected it, the engine idle smoothed out and now we have heat as designed at idle.
Surging idle on GT40, especially when cold 08-23-2016, 01:44 PM My 2001 Ski Nautique has this annoying throttle surge when it's idling, and it seems to be more pronounced when the engine is cold.
Mainly when cold but off and on throughout the day. When its surging and put it in drive, start driving and let off the throttle it will bog down to about 600 rpms and almost shut off, then pop back to normal surging. The fuel filter doesnt seem to be holding prime.
Jul 31, 2012 · My idle surge was similar to what others described here, where it would be fine after cold start, but begin to surge when the computer entered "closed loop". The surge was from around 500-1500, and would eventually stall without intervention.
for the past few winters my truck surges for around 10 minutes at idle while cold the valve that feeds exhaust to help warm the truck fluxuates as well.If you blip the throttle once its stops for a couple minutes and has a good idle then will start back up with the surging.It will also do it...
When running at idle hot or cold the idle goes up and down about 100rpm. Very intermittently. I have read it could be the ipr? But I havnt found any post where they actually got to the bottom of the issue? Any thoughts are appreiated. BTW... dp tuner, 38r turbo, 4 inch turbo back, cold air. Fuel pressure at 60-62 lbs at idle.
RE: cold idle/stalling IP: Logged Message: Nicole Like Tad said clean the IAC "motor" It is located at the rear of the TB. I takes two TORX head screws to remove (#25, I think). Clean the IAC "plunger" and the hole in the TB. 14.63 @ 91.8 troubled Dodge Dakota JOIN HERE 2/28/2003 15:39:38: RE: cold idle/stalling IP: Logged Message:

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Knight moves in chessThe search didn't bring me anything extremely helpful. I have a '99 3500 5-speed 2wd. Lately, within the last 3 weeks or so, my truck will surge when I first start it. It never happens when the motor is cold, only if I run it a little while then shut it off. Like if I run across town to a store, when I come back out it will surge. I mean it ...

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Complaints of surging or loping idle are often caused by a faulty fuel pressure regulator. This brand new BOSCH ® regulator can fix your problem. Categories: Chevy / GMC Duramax Injectors, LBZ 2006-2007.5, LMM 2007.5-2010 Tags: 0 928 400 673, 0928400673, 97384667, chevy, DURAMAX, fuel, fuel pressure regulator, gmc, lbz, lmm, pressure, regulator.