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Chevy Suburban Rough Idle and Stalling

95 messages,  Last post on Nov 03, 2009 at 6:57 AM

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#46 of 95 Re: Stalling while coming to a stop or idling [elorenzo39] by pear69 Apr 11, 2008 (6:51 am)
Replying to: elorenzo39 (Apr 10, 2008 9:39 am) Your factory fuel injection system is called a Sequential Port Fuel Injection system (SPFI). That is what the dealer means by sequential. There has been a lot of problems with this system. You said you installed the updated fuel injection version, make sure you tell them this. The updated version is called Multi Port Fuel Injection (MPFI). At the dealer they may want to run an injector cleaner through your updated system, this could cause problems with the updated system you installed. If it were me I would check the distributer first and replace/or/fix it before taking it to the dealer, you have to take it there anyway to get it timed after messing with the distributer and to have a crankshaft sensor relearn proceedure done. Changing the plugs and wires to A/C Delco is a very worthwhile decision. Keep me posted P.S. sorry I couldn't reply last night, the site was down. Replies to this message: elorenzo39 (Apr 11, 2008 7:05 am)
#47 of 95 Re: Stalling while coming to a stop or idling [pear69] by elorenzo39 Apr 11, 2008 (7:05 am)
Replying to: pear69 (Apr 11, 2008 6:51 am) Thank you. I bought the spark plugs last night $6 a piece and will install it maybe tonight and the wires.   Thanks again and have a great weekend.
#48 of 95 Re: P0300 and P0304 mis-fire on 99 Suburban. by elorenzo39 Apr 17, 2008 (2:53 pm)
Replying to: elorenzo39 (Apr 10, 2008 9:39 am) Hello Pear69. Brought the Suburban to the Chevy dealer and they are replacing the whole entire Sequential unit even after I told them I bought a new one already. The truck runs great now. They fixed and replaced the injectors at no charge under California Special Warranty on Sequential unit up to 200,000 miles. They also replaced my distributor assembly, but have to pay for that job.   Thanks for all the help and advises that you have given me.   Elorenzo39 Replies to this message: pear69 (Apr 18, 2008 12:44 am) elorenzo39 (Apr 18, 2008 7:04 am)
#49 of 95 Engine Reduced Power by woodyj Apr 17, 2008 (3:39 pm)
What causes Engine Reduce Power to show up on my instrument cluster. Everytime this happens, my engine dies down to an idle and loses power. I have to turn off my suburban and restart it after about a minute. I would appreciate some pointers.
#50 of 95 Re: P0300 and P0304 mis-fire on 99 Suburban. [elorenzo39] by pear69 Apr 18, 2008 (12:44 am)
Replying to: elorenzo39 (Apr 17, 2008 2:53 pm) Elorenzo39, You are welcome. I am curious about the condition of your distributer gear. Was is worn out? That's great that you had the dealer change the injectors for free--A/C Delco plugs are expensive but they last for 100,000 miles--I'll help anytime--good luck. Let me know about the distributer gear if you can--thanks. Replies to this message: elorenzo39 (Apr 18, 2008 7:04 am)
#51 of 95 Re: P0300 and P0304 mis-fire on 99 Suburban. [pear69] by elorenzo39 Apr 18, 2008 (7:04 am)
Replying to: pear69 (Apr 18, 2008 12:44 am) Hello Pear69,   I wish I could tell more about the Distributor Assembly. I did not see it myself. Dealer just called me and asking me for approval to replace it and I approved the work over the phone. They are jam pack with a few Suburbans and Silverado's with the same issues. They actually had my Truck for a few days. Dropped it off Last Friday and did not get it back until Wednesday morning. Service advisor told me that they are working on alot of vehicle that has the same problem as mine.   Thanks again for all your help.   Elorenzo39
#53 of 95 2002 5.3L shuts off after running for a while by gators27 May 04, 2008 (12:28 pm)
Its not pulling any codes and the Dealer isnt sure what it is either the fuel pump pressure is good they changed the filter, and it still stalls out after its bin running for a couple hours like it ran out of fuel they also told me it could be the cadeletic converter but they werent sure it is only a hunch well i wasnt spending over $1000 on a hunch when they werent sure. Can someone help? Replies to this message: woodyj (May 19, 2008 6:48 pm)
#54 of 95 rough idle after new plugs and wires by mkotzur May 19, 2008 (6:17 pm)
I have a 2001 chevy suburban 1500 2wd and I've replaced the plugs and wire set. Now the vehicle is running rough and the check engine light is on or blinking. I've checked for a possible bad wire and plug and they are fine. When I hold a spark indicator against each of the wires and only one will show a stronger spark. Switching the wires around still give me the same strong indication. I've also switched the plug wire module around with no effect. Could it be the ignition control module and where is it located on the engine compartment? Replies to this message: woodyj (May 19, 2008 7:11 pm) pear69 (May 20, 2008 2:32 am) elorenzo39 (May 20, 2008 6:49 am)
#55 of 95 Re: 2002 5.3L shuts off after running for a while [gators27] by woodyj May 19, 2008 (6:48 pm)
Replying to: gators27 (May 04, 2008 12:28 pm) I would suggest checking on your throttle position sensor. Either it would be bad tps or bad wire connector. Secondly check on the spark plug module wiring harness, and could be due to bad wires.

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