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Old 07-18-2011, 05:04 PM   #1
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Default 1995 Bonneville SSEi

I have a 1995 Bonneville SSEi 3.8sc. One big problem I have is when the outside temperature reaches around 90% or above and after the car is driven for a few minutes it starts to die out and eventually I can barely keep it going. If i step on the gas it will not respond, it will jerk back and forth like I am taping the gas pedal. I have had this problem for 2-years. If I put the car in neutral when i am moving I can rev the engine but it takes a few seconds of pumping the gas before it revs and then it will only go to a certain rpm, i think around 3.5 or so and the break up. I have had fuel pump and filter checked and both are ok.
I have heard possibilities of things like Oxygen sensor, Super Charger, clogged catalytic converter, bad coil.
Any help would be appreciated.
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Old 07-18-2011, 06:40 PM   #2
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Do you have any codes? Do you see the SES light flashing at all? The supercharge wont cause this. It would just cause a loss of power, but not a huge loss. I would test the coils, and plug wires. how old are the plugs.
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Old 07-18-2011, 06:47 PM   #3
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The plugs are several years old. The wires are new. Is there any whey i can check the coils myself.
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Old 07-18-2011, 06:50 PM   #4
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Also I have had codes for several years. The EGR valve always shows up and I have replaced it twice and made no difference.
I do have a vacuum leak on the upper EGR tube which I am still trying to seal because I have not been able to locate a new or used one for the Super Charged engine.
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Old 07-18-2011, 07:18 PM   #5
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Well, if you have been driving with a leaking EGR tube, your AFR has been off. I would suggest fixing the known problems. Check at your local salvage yards. The pick and pull yards should have something for you.
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Old 07-18-2011, 07:28 PM   #6
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Thanks, will do.
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Old 07-18-2011, 07:50 PM   #7
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Welcome to the forum! Hopefully we can help ya fix er up
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Old 07-22-2011, 03:22 AM   #8
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welcome
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Old 07-22-2011, 10:47 PM   #9
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welcome to the forum
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Old 07-24-2011, 12:31 PM   #10
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Default 1995 Bonneville Oxygen sensor

I have just purchased a oxygen sensor of ebay and realized when I got it that i would have to splice the wires together, there is no plug attached. The problem is that I do not know which wires to attach because the colors don't match. I know where the wires are supposed to go from the new sensor, like purple and white are heater, grey is ground and black is signal. But i do not know where to connect them because I do not know the destination of the original wires which are purple, tan, and 2-brown.
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