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07-20-2020, 04:52 AM | #1 |
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Location: Dallas, TX
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91 C1500 5.7 idle miss
Truck does not sound the same and miss began yesterday. Plugs 2 yr old. New coil (Accel) tps, ignition control module, idle air control in the last couple months as preventative maintenance. Replaced o2 today. Truck idles bad. Egr 5 years old. When I disconnected the timing wire to check timing, truck almost died so I could not complete. Any suspects?
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07-20-2020, 06:41 AM | #2 |
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Re: 91 C1500 5.7 idle miss
My first though is to look for vacuum leaks at the base of the throttle body, well heck anywhere on the top of the engine. What about your plug wires and cap/rotor?
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07-20-2020, 01:15 PM | #3 | |
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07-23-2020, 10:22 AM | #4 |
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Re: 91 C1500 5.7 idle miss
If it was running good and you replaced anything and then it started acting up I would suspect those parts. Not uncommon for new parts to be bad.
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07-23-2020, 11:00 AM | #5 | |
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07-23-2020, 01:08 PM | #6 | |
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Re: 91 C1500 5.7 idle miss
Quote:
I went through a 2 month trouble shooting a miss and it turned out to be a new /3-4 month old set of plug wires I put on as part of a complete tune up. I had two new distributor caps fail during this time, trying to find the original problem too. NEVER assume new parts are good parts.Quality of new parts are not what they used to be. |
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07-23-2020, 01:38 PM | #7 | |
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07-23-2020, 01:43 PM | #8 |
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Re: 91 C1500 5.7 idle miss
Not trying to be an ass or anything like that that is a quote from you first post in this thread on 7/20.
If it is not the case then you ignore it, but you did say you had installed parts in the last couple of months. |
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