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Chevrolet Suburban and Tahoe Start problems

178 messages,  Last post on Nov 15, 2009 at 3:25 PM

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What is this discussion about? Chevrolet Suburban, Chevrolet Tahoe, Chevrolet Tahoe Limited/Z71, SUV

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#127 of 178 Re: difficult cold start [bonillot] by arrie Feb 09, 2009 (4:09 pm)
Replying to: bonillot (Feb 09, 2009 12:59 pm) So,   now it cranks but won't start.   Trouble shooting basics:   1. Check that you have spark. Easiest way to do this is to take one spark plug boot off and insert an extra spark plug on it (can also do it for all spark plug wires separately). Then placing it against engine ground have someone crank the engine and observe if you have a good blue spark. You should hold the boot with isolated pliers or tape it on a wood stick to hold. If you have a good spark you have a good chance for a little electric shock if you hold boot by hand.   If you have spark then problem is with fuel delivery system unless your spark timing is all messed up. In that case the engine should show some kind of signs of trying to start though.   2. If spark is ok you need to check for fuel delivery in the engine rail. Go buy a fuel pressure gauge that screws in the service port of your fuel rail. When cranking the engine you should read 40-60 psi.   Fuel gauge should also have a bleeder line. Mine has a small diameter plastic tube that lets fuel pressure out from fuel system when a button is pressed. Very handy to use before working on the fuel system.   You can use the bleeder line to get a sample of your fuel entering the engine. If fuel really has gone bad perhaps you can sample it and see if it even burns.   Remember, as long as the spark works at the correct time and correct quality fuel is delivered in the engine it will run.   Check those for starters.   Arrie
#129 of 178 Tahoe Won't Start by rwolford Feb 09, 2009 (4:57 pm)
We have put a new starter and checked batteries and vehicle will not start. Any ideas? Replies to this message: kiawah (Feb 10, 2009 2:41 pm)
#130 of 178 Re: Tahoe Won't Start [rwolford] by kiawah Feb 10, 2009 (2:41 pm)
Replying to: rwolford (Feb 09, 2009 4:57 pm) Your symptom description leaves a lot to be desired. It may be obvious to you since you are there watching and hearing it....someone on the other end of a pc terminal can only read your symptoms.   For instance....   Is the starter engaging, and turning the engine, but the engine doesn't start running?   or, when you turn the key you hear click, click, and the starter doesn't engage and the lights dim?   Any other symptoms that you can describe?
#131 of 178 2003 surb intermittent rough starting by Jessedm Feb 16, 2009 (12:55 pm)
I have 73k miles on my '03. Has original plugs/wires. I have changed the air/fuel filters. Intermittently cranks for a while when starting, hot or cold. Idles rough when AC on. Sometimes when it cranks for a few seconds without starting, I will turn the key off for a second or two and then on again..starts right away.. The engine runs fine at speed.....any suggestions?? thanks Replies to this message: Jessedm (Mar 29, 2009 10:34 am)
#132 of 178 suburban starting problem by evergreen1 Feb 23, 2009 (9:45 pm)
We ahve a 2004 suburban 1500 4x4. Recently it has developed a very intermittent starting problem ( aboiut once pre 2-3 weeks). The vehicle simply will not crank or make any nosie when the key is turned. These is no clicking. The lights come on as expected. If we try to start it 10-20 minutes later sometimes it starts right up. never had it die once it starts. We're replaced the battery, had it to the dealer 3 times, and even to a specialized auto elecrtic shop but no one has any ideas nor do they find any codes on the computer. Any ideas as we now have a vegicle that is unreliable and yet can't afford to buy a new one and to sell this lemon. Replies to this message: kiawah (Feb 24, 2009 12:05 am) evergreen1 (Feb 24, 2009 8:34 pm)
#133 of 178 Re: suburban starting problem [evergreen1] by kiawah Feb 24, 2009 (12:05 am)
Replying to: evergreen1 (Feb 23, 2009 9:45 pm) Intermittent problems are the hardest for a repair shop to fine, because of course it never fails while they can see and diagnose the problem.   What I would do, is to connect a fused test wire from the starter solenoid...to back inside the car. Get yourself a volt meter, so you can measure the voltage on that wire when you have the failing no-start condition.   If you have 13+ voltage on that test wire solenoid when you turn the key, and the starter doesn't turn then you have proved you have a starter/solenoid problem and replace that unit. If you don't have 13+ voltage, then you are not getting the necessary voltage from the 'control' circuitry. You need the electrical schematics from your car to prove, but suspect key switch or possibly the security system doesn't like your key anymore. Try a different key.   Unfortunately since it is intermittent, you will have to do some of the diagnostics yourself or you'll have this problem for a while until this intermittent problem becomes more permanent and the shop can see the failing condition after you have it towed to the shop. Replies to this message: evergreen1 (Feb 24, 2009 8:34 pm)
#134 of 178 Re: suburban starting problem [kiawah] by evergreen1 Feb 24, 2009 (8:34 pm)
Replying to: kiawah (Feb 24, 2009 12:05 am) Well two guys came out from the district office to our house. My wife is persistent and polite or maybe it was related to the bailout. Anyway they got it going and took it to the shop and said that now they were sure it was the starter and that previously it was so intermittent that they didn't want to replace it. So you were right on with it becoming more permanent. Thanks for you help.
#135 of 178 Re: 2003 surb intermittent rough starting [Jessedm] by Jessedm Mar 29, 2009 (10:34 am)
Replying to: Jessedm (Feb 16, 2009 12:55 pm) Well, here's the answer to my own question. I took my Suburban in for the smog cert. It passed without any problem. I asked the mechanic about my idle and starting problems. He knew right away. He cleaned the injectors and the flap inside the throttle body (the throttle body was the real issue). That fixed the problem. The engine starts and idles perfectly.
#136 of 178 99 Tahoe problems starting by heffron4 Mar 29, 2009 (3:28 pm)
99 2 WD w/45K mi. Several mo. ago we had a problem with it not starting at all, it would act like it was going to start but just didn't keep running. It had been very humid out. Several hours later, we tried to start it & presto, it started. Did the same thing the next day-wouldn't start and then several hours later it did. Took it to a dealership. They keep it for a week and it started like a champ-of course! Suggested it might be the fuel pump, but nothing for sure since they couldn't get it to repeat. Told us about hitting the underneath and keeping more than 1/4 tank of gas in it. Brought it home, no problems since until today-after a weekend of rain, ice & snow (again lots of moisture in the air...) Tried to start it several times, with no success and then several hours later-it started again. Any known problems with moisture and what to do about it? Any other thoughts? Replies to this message: arrie (Mar 30, 2009 7:16 am)

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