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SUVs Chevrolet Suburban & Tahoe Chevy Suburban Rough Idle and Stalling
95 messages, Last post on Nov 03, 2009 at 6:57 AM
You are in the Chevrolet Suburban & Tahoe Forum. Your Hosts are steve_ & tidester
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Replying to: tjohnston3 (Apr 30, 2009 11:15 am) Then it could be a sticky throttle or bad throttle control motor, i.e. needs throttle body replacement. Sticky throttle should get helped with a good clean-up. Arrie |
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Trust me on this, I fought this problem for over a year. The problem is the Intake Manifold Gasket. The original gaskets were too thin and cause this rough idle problem when the engine is cold. Mine would run fine during the summer and only had issues when the temps started getting below 40 at night. Through much research I finally tracked it down to the gasket. The replacement gaskets are much thicker and seal the air leaks. The correct replacement gasket is orange. Mike |
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I have a 99 Chev Sub. Replaced the fuel pump 6 months ago, new fuel filter 1 month ago. Stalls out of the clear blue, and won't start for several hours, seems to be heat related but can't prove that. Could run for days with no problems but lately it seems to be getting worse. Fuel pump seems to be getting fuel to rail but don't see anything going into the carb during this start problem. I can put fuel in the carb and it starts but quits. Don't know where to turn at this point without dumping $$ into it. Was stranded next to a dealership and the mechanic simply said fuel pump. How could it be a fuel pump when it pumps fuel to the injectors? Open for suggestions. Brad
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Replying to: sevenrhinos (Jul 20, 2009 10:34 pm)
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Replying to: sevenrhinos (Jul 20, 2009 10:34 pm) Check the fuel pressure at the fuel rail. If it reads 45 - 60 psi forget the fuel pump issue being the reason for trouble. If it does not read mentioned pressure range then first check or just replace the cheap fuel pressure regulator and test for fuel pressure again. If after regulator change it still does not read needed pressure then it is time to think about fuel pump failure,not before these checks. When car is not running the pump runs only momentarily ( 2 seconds or so) when you turn the key so you probably need someone to help with the key turning when you monitor the fuel pressure gauge. Arrie
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Replying to: woodyj (Jul 21, 2009 4:55 am) Also, there is an infamous ground that can corrode and cause your fuel pump cut out. It is connected to the frame rail just before the gas tank. It is a black wire that breaks out of the fuel pump wireing harness just before the fuel pump itself. This ground connection should be removed and cleaned up. This is the ground that the fuel pump relies on to run. If it is corroded (and it probably is) it can cause an over load in the fuel pump circuit which will in turn cause your fuel pump to work harder and fail....This could have been the problem with the last fuel pump...
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Replying to: pear69 (Jul 21, 2009 7:47 pm) |
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Replying to: arrie (Jul 21, 2009 7:36 pm) |
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Replying to: pear69 (Jul 21, 2009 8:00 pm) I would attach a picture of my fuel pressure regulator but I don't know how. Arrie |
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Replying to: arrie (Jul 23, 2009 3:29 pm) The help section (link at bottom of this page) gives instructions for posting pictures. You can also post them to your carspace page and link them here. tidester, host SUVs and Smart Shopper |
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