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1987 6000 2.5 has rolling idle and code 44. - Cars & Trucks

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Why GM 5.7L TBI Truck shows code 44 lean exhaust. Engine light comes on after about 8 miles. Fast Idle after warms up only.


Still sounds like an air or vacuum leak with that high idle...did you check the brake booster, or plug off that line?

Can you observe the cone pattern of the injector spray? Is it a fine mist and a clear cone pattern? No problem with drips or clogs?

One way to check for intake gasket leak into the valley: close off ALL vacuum lines, every one from the intake manifold. Then run the engine and take off the oil filler cap. There should be a slight pressure, but if there is a vacuum at the filler cap, there is an intake gasket leak into the valley. I haven't tried this, but I read it on a buick forum once, so let me know if it works or not.

Jan 22, 2016 | Cars & Trucks

1 Answer

Chevrolet code 44?


Click HERE for GM fault 44 diagnois and repair info.

Feb 20, 2012 | 1995 Chevrolet K2500

1 Answer

Code 44 on 1994 chevrolet k2500


Cick HERE for diagnosis of code 44

Feb 20, 2012 | Cars & Trucks

1 Answer

Diagnose 1988 ford e150 fault codes 12, 21, 34, 44, 13, Engine overheating, throttle high on idle, and while driving


Based on the codes you gave the high idle is because of the EGR valve. (12,13 and 34)
21 is a temp sensor code, and I don't have a 44 listed. I hope this helps.

Feb 23, 2011 | Ford E-150 Cars & Trucks

1 Answer

Engine light code 44 1994 GMC Sierra Pickup HD 5.7l, 4wd.


look for a serious exhaust or intake leak. look for bad wires to the o2 sensor or map sensor. just for starters.

Jul 20, 2010 | 1994 GMC Sierra

1 Answer

Surge at idle


buy manual, check and reset tps, you will need cheap ohm meter

Sep 12, 2009 | 1987 Chevrolet G30

1 Answer

Code 44 1990 suburban eng constantly on after new o2 installation in morning starts rough,drive a few blocks its ok.go to the store let car sit 15-30 min restart does same thing stummbles for few blks once...


there are 11 representations of code 44 but basically the exhaust is lean, and/or idle switch open- adjustment, and/or exhaust gas recirculation, pulse width modulation error. Hope that helps.

Apr 29, 2009 | 1990 Chevrolet Suburban

2 Answers

Throttle/Idle/running problem - wants to run too fast, or stall out


RPM's up and down check EGR valve and sensor. EGR valve and sensor control idle. That's why your getting the surging on rpm's and this could be giving out the other codes. If mass flow was bad car will not start and the same for the map sensor. O2 sensor measures gas and air for right mixer. TPS controls 0-60 speed as in throttle respons.

Apr 28, 2009 | 1989 Pontiac Grand Prix

2 Answers

Trouble code 33 &44


Code 33 is MAF sensor (mass airflow sensor ) & 44 is lean exhaust mixture. My guess is 33 is causing 44.

Feb 05, 2009 | 1987 Pontiac Grand Am

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