LT1 running bad from 3000RPM and up? Backfiring.Stumbling No power
11-01-2006, 10:19 PM
#1
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LT1 running bad from 3000RPM and up? Backfiring.Stumbling No power I have a new Opti Distributor, New plugs and Wires, MAF,Rebuilt 355, New Coil , And Fuel Pump Walbro 255 WTF! It's kicking my ***. My idle is also up about 250 rpms and my car is in and out of Open and Closed loop mode.
11-02-2006, 12:03 AM
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Well this is a fresh motor with about 3000 miles on it. Have either of you had these problems before? So if the rockerarms are loose ith will do this or if they are tight? I just checked the wires but i will do it one more time. The funny thing is it only does this once it warms up.
11-02-2006, 09:27 AM
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If the car only does that when it gets warmed up is a good indication that the wire from the harness to the opti is bad. My car started the same thing, and then it started to go died and would not crank until the engine cooled. I found out that the wire tends to coriode. It could also be the coil breaking down, but if the rpm elevates. then check the wire first.
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11-03-2006, 09:16 AM
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I would check the wire first. I have had to put 5 opti's on my car in the past 2 yrs. let me just tell u DO NOT but an aftermarket from a part store.If you don't have an ac delco then that could be it. I bought one from Advance auto and O'reilly's and they lasted any were from one day to 2 mths. I tried 2 from each store and they all failed. Take the wire and on the connector, be careful and pull the rubber piece down from the bottom were the wire goes in. you might be able to see something. If nothing else soak the connector down with contact cleaner. That might help it out.
11-03-2006, 10:54 AM
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sounds like a bad opti
it took 3 tries for Accel to send me a good one
if the new opti didn't help when you put it on you might have gotten a **** one from the start
it took 3 tries for Accel to send me a good one
if the new opti didn't help when you put it on you might have gotten a **** one from the start
11-05-2006, 01:05 AM
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Originally Posted by ZEX-Z
Do you have any idea where to buy the wire that leads to the opti? Does anyone think it could be the ignition control module going out?
11-08-2006, 08:55 AM
#16
I changed out the tpi sensor and the ICM and neither of these fixed the problem. I do have aftermarket injectors 32lb accels but do I really need that big of an injector? I have had my heads ported to stage 3 and a 584" lift cam 2.08" 1.62 " Valves ported intake and throttle body.
11-08-2006, 06:12 PM
#18
Originally Posted by tadevouru
If the car only does that when it gets warmed up is a good indication that the wire from the harness to the opti is bad. My car started the same thing, and then it started to go died and would not crank until the engine cooled. I found out that the wire tends to coriode. It could also be the coil breaking down, but if the rpm elevates. then check the wire first.