2001 suburban 1500 stalling

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  #1  
Old 01-04-15, 01:07 PM
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2001 suburban 1500 stalling

2001 Suburban 1500 4wd. 112,000 +/- miles. Had a rough idle, changed plugs and wires, cleaned mass airflow sensor, changed air idle control valve and finally changed intake manifold gasket. Fixed rough idling but now it stalls after starting it (it will restart) and it will stall when breaking, like pulling into a parking spot or turning ( will restart every time…) Any advice? EGR? Fuel pump?
 
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Old 01-04-15, 03:07 PM
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No error codes?
I'd be suspect of EGR for starters.
But what hesitates me is that it stalls when you brake. See, then vacuum is drawn by the brake booster. And if it's vacuum relevant, then you have vacuum or air leak somewhere.
Try brake cleaner shots test. And don't forget your PCV.

Solving Automotive Idle Problems - Eric The Car Guy- Stay Dirty!

Solving Automotive Idle Problems - Eric The Car Guy- Stay Dirty!
 
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Old 01-04-15, 03:52 PM
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Any stored codes? ............
 
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Old 01-04-15, 06:43 PM
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Thanks for the reply! Originally it was giving me the P0171, P0174 and P0300 codes running lean on both banks. After we found the leak from the intake gasket those went away and have not returned or seen any new codes…
 
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Old 01-04-15, 07:48 PM
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does this have a hydro boost for brake assist? if so make sure the power steering pressure sensor is hooked up.
 
  #6  
Old 01-05-15, 06:45 AM
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please do tests shown in vids posted. Leaks are very hard to completely stop.
btw, locate and pull out your ECM fuse. may say PCM. same difference, main computer. pull out for about an hour.
 
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