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SUVs Chevrolet Suburban & Tahoe Chevrolet Suburban and Tahoe Start problems
107 messages, Last post on Oct 01, 2008 at 4:44 AM
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Replying to: jp3texas (Feb 08, 2007 2:50 pm) 
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I have an occasional (every 4 or 5 months or so) a recurring issue with my Tahoe. It will turn over, rev up like its starting and then immediately die. The fuel pump has been replaced twice, once at 70k another at 190k. Fuel filter replaced too numerous to count. The longest period of time between starting problems (about 15 months), the dealer replaced the negative battery cable. In the past it may run after about 10 minutes, or it may be later in the day, or not at all. This week I did a little off roading, (not mud riding), it ran fine. Got out, hiked for about 3 hours and came back, it would not start. Just crank, rev, die. Rolled the tahoe forward about 20 yards and it ran just fine. No problems since, but of course I'm scared to get to far from civilization. Any suggestions? Can it possibly be the negative battery cable? Thanks in advance.
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Replying to: richarr3 (Apr 12, 2007 12:51 pm) As your problem is very intermittent it kind of says you have a loose wire connection somewhere. And it most certainly is not the negative battery cable. If it was, your engine simply would not crank when you try to start. I have a '04 Tahoe LT and have had a couple bad connection issues. The first one was wire harness to MAP sensor. When engine was in idle it shut off when I touched the wire harness. And this did not even leave a code in the computer. I'm not sure if loose MAP sensor wire would prevent engine from starting but it could. Map sensor is located on top of the engine by the fire wall under the plastic engine cover. Another problem I had with MAF wire harness. Soldering those wires to connectors improved my engine performance a bit. This should not prevent the engine from starting though. You could have a bad connection on the crank shaft position sensor or the sensor itself is bad. This sensor is located behind the starter motor, which must be removed to gain access to the sensor. This is not very bad job if you are a hands on person. It does require a torque wrench though for tightening the starter motor bolts to correct tightness. Crank shaft position sensor cost about $70 I think. I replaced mine and it was $65 + tax. Replacing it would rule that out as a problem and this sensor will prevent the engine from starting if it goes bad or signal does not get to the computer for a bad connection. Another sensor that would not let engine start is cam shaft position sensor. It works the same way as crank shaft sensor and is located in a more difficult place on top of the engine by the fire wall. It is lower on back side on engine that the MAP sensor and is quite hard to reach. I would think that a good mechanic would be able to change this without removing the intake manifold from the engine. Arrie |
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| I have a 1999 Tahoe that is occasionally having trouble starting. At times it cranks, tries to start, and dies, so I knwo it is getting fuel and ignition. It is not the starter or battery. Appears to happen only in mornings or in humid environments. Sometimes after several attempts it will start, but most of the time it will either start first time, or will not start at all after multiple attempts. I have seen similar posts on this issue, but have not seen a resolution. Has anyone solved this problem?? | |
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Problem: Truck is hard to start when cold start in the a.m. Symptom: Must turn ignition on and off several times before engine will fire. Have to give it gas to start. Almost sounds like it’s “gargling” when it does. The problem goes away once warm. Seems more of an issue with a full tank of gas. History: Fuel pump replaced last summer. Not starting as fast as before. Truck stalled twice this summer when coming to a hard stop with the A/C on. Service Engine light came on 2 weeks ago. P0452 Fuel Tank Pressure Signal circuit Input below minimum. The difficulty starting has become more serious over the last 2 weeks. |
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2001 Tahoe 5.3L. Jump in and turn the key on the truck will crank but not start. If i try to crank it again it acts like it fluids and i have to let it sit. If I get in and turn the key on and let the fuel pump cycle once or twice it will start no problem. Fuel pump was replaced and also the fuel regulator. Please help. I have seen some posting about the security. My security light does not come on when i have this problem.
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Replying to: jp3texas (Feb 08, 2007 2:50 pm)
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