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Tahoe Ignition, Injector, Other Problems?

21 messages,  Last post on Nov 26, 2009 at 1:02 AM

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What is this discussion about? GMC Yukon, Chevrolet Tahoe, Chevrolet Tahoe Limited/Z71, Fuel System, Electrical, Engine, Exhaust, SUV

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#1 of 21 99 Tahoe Ignition, Injector, Other? Problems by shawno Feb 06, 2007 (6:23 pm)
My '99 Tahoe has missed a bit a low idle but ran great at highway speeds until the other day. I was driving up a mountain and dropped out of overdrive and the truck began shaking violently. I thought it was a flat but ruled that out quickly and decided it was the engine or transmission. I slowed to pull over and it stopped shaking. The check engine light came on. I got out to inspect. Nothing obvious. Drove it at regular speed to the dealer where they suspected cadalytic converter. The error code was a misfire on cylinder 4. They ruled out the cc and then said my injectors were dirty. They flushed the injectors and test drove and had another engine light with shaking. This time cylinder 3 was misfiring. They wanted to replace all 8 injectors for $1300. I started to do it but then hesitated. Why would 2 injectors fail at the same time? Not likely I imagine. Do you know what might cause this? What else should I look at first? If it is injectors, does anyone know a do-it yourself guide to replacing injectors on a Tahoe? Thanks in advance. Replies to this message: arrie (Feb 18, 2007 9:26 am) shawno (Feb 19, 2007 4:21 pm) woodyj (Jan 30, 2008 8:00 pm)
#2 of 21 What makes a good fuel injector? by shawno Feb 06, 2007 (6:27 pm)
Does anyone know how to select a fuel injector? I work for BorgWarner and we make injectors - I could probably get them cheap or free. But if there is a better product I would like to compare. How do I pick? Replies to this message: kenmoose (Apr 25, 2007 6:52 am)
#3 of 21 Re: 99 Tahoe Ignition, Injector, Other? Problems [shawno] by arrie Feb 18, 2007 (9:26 am)
Replying to: shawno (Feb 06, 2007 6:23 pm) I can guarantee that your fuel injectors is not the problem. Your dealer is just trying to make a buck on you!   You probably have a crank shaft position sensor or cam shaft position sensor gone bad.   Crack shaft position sensor is easy to change at least in my '04 Tahoe (I don't know how '99 is but should be about the same..?). It requires removing the starter motor but it is not too hard to do. Also, any garage can do it for you.   I think the sensor cost about $65.   I would definitely change the crank shaft sensor first before doing anything else.   Arrie Replies to this message: shawno (Feb 19, 2007 4:21 pm)
#4 of 21 Re: 99 Tahoe Ignition, Injector, Other? Problems [arrie] by shawno Feb 19, 2007 (4:21 pm)
Replying to: arrie (Feb 18, 2007 9:26 am) Thanks - I'll look into that first. It sounds a load easier than injectors. Thanks for the advice.
#5 of 21 2004 Tahoe stated missing by asheraustin Feb 20, 2007 (2:49 pm)
I've got a 2004 Tahoe, and it suddenly started missing. It has a rough idle, and when I kick it down on the road, black smoke puffs out the exhaust for a few seconds. A mechanic has checked the plugs, and wiring, it all seems fine. THe computer he used showed number 1 and 3 missing, 1 is the worse. HE switched the modules and it still missed. We noticed when it first starts up, it doesn't miss.   Any ideas?
#6 of 21 Re: What makes a good fuel injector? [shawno] by kenmoose Apr 25, 2007 (6:52 am)
Replying to: shawno (Feb 06, 2007 6:27 pm) This is a late reply and you may have the problem fixed by now but maybe this will help someone else. I had the exact same problem and the deal wanted to blame the injectors. My father-in-law ask about the fuel filter. I said surely they checked that first. Guess what, wrong. Since it was fairly easy to get to I decided to check it. It was so stopped up. A quick trip to AutoZone and an hour later and all was well. The filter is on the drivers side easy to get to. Later I had to replace my fuel pump and was told the bad filter may have caused the pump to over work causing it to go out early. At the time of the trouble I had around 80k on the Tahoe.
#7 of 21 Fuel filter change very important... by ckcc Apr 27, 2007 (10:18 am)
Very important to change the fuel filter, my dealer advised 15 - 20k changing. I have 52k on my 04, and had to put a new pump on it yesterday..If I had replaced the filter sooner, I would have about $900.00 extra dollars in my pocket. They had to clean the injectors as well.
#8 of 21 Re: 99 Tahoe Ignition, Injector, Other? Problems [shawno] by woodyj Jan 30, 2008 (8:00 pm)
Replying to: shawno (Feb 06, 2007 6:23 pm) Sorry to post this message kinda late. But I had same problem with my 2003 Suburban. Sounds like your Main Coil Wire Harness connectors are bad. This is the wire harness that connects to the the 8 individual coils that are connected to the spark plugs. The dealer gave me same crap about replacing fuel injector wires. I don't know where they get certified if they don't know how to troubleshoot and actually fix problems.
#9 of 21 03 gmc yukon 4x4 starting problems by gordonwhitesel Feb 17, 2008 (11:50 pm)
I have had a problem starting my yukon for about six months now. The weird thing is every time i contacted onstar when they were still analog and had them do a diagnostic check it started up right when i got off the phone. now they cant do one since they have gone digital and i cant start my yukon. everything engages from the relays to the starter but it doesnt turn over. I sprayed quick start in my intake to see if it was the fuel pump but got nothing. i replaced the battery and still nothing. i got a spark plug tester and its not producing any spark on one. my father keeps saying its the ignition cylinder and it might not be getting the right ohms so the factory security system wont let it start. I even hooked up an obdII to it and not one code came up at all. there are no lights or anything that show on the dash. the only thing it says when i turn the key to on is SERVICE BRAKE BOOSTER and STABILITY SYSTEM OFF. What else is there to check before i change the ignition cylinder? Replies to this message: rockman59 (Feb 18, 2008 7:58 pm) gordonwhitesel (Feb 18, 2008 9:30 pm)
#10 of 21 stalls while driving by dangar64 Feb 18, 2008 (5:44 am)
As I was driving to San Antonio from Austin at 75 mph my Tahoe suddenly stalls. I moved to the emergency lane and put it in neutral and it started fine. A couple of hours later while still driving to get to Laredo, It stalls again at 75 mph, I put it in neutral and starts fine and I continue to Laredo. After getting to Laredo it stalls again and it starts fine. What could this be. My engine light turned on so I go to Autozone they check it and say that my oxygen sensors are bad?????? I think they are wrong. Has anyone ever had this problem??? Please help!!!!!!!! Replies to this message: kiawah (Feb 18, 2008 6:14 am) tidester (Feb 18, 2008 8:13 am) roblisasmith (Jun 07, 2008 6:56 pm) jamelt (Jul 27, 2009 2:49 pm) kimy (Nov 26, 2009 1:02 am)

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