Hello All,
I am in serious need of some technical help. My 87 GN has developed a serious problem. While driving along it sometimes hesitates or stumbles or buck at low speeds but sometimes it is fine at low speeds. The real problem occurs while driving at around 60 mph or even accelerating to crusing speeds, then it hesitates and stumbles alot more. I have been interchanging parts to see what might have gone bad. I have not had any check engine light come on nor have the scan-master shown any codes or any readings out of alignment other than the speedometer on the car reading alot less than what the scan-master shows while driving along, but the car has had that problem before the hesitation thing came along. Well here is a list of the things that I have tried or checked or changed:
- Fuel Filter changed
- Fuel Pump checked
- Fuel Injectors changed
- Fuel Pressure stays up while hesitation continues
- Assume Fuel Pressure Regulator is fine
- Swapped Computer chip and Computer
- Coil Pack checked and swapped
- New Plugs and Wires
- Checked and swapped cam sensor cap
- Checked Crank Sensor - tight and no apparent damage
Well at first when it started I thought that i got a batch of bad gas or something like that, maybe water in the gas of such, so I drained out the tank and changed the gas and it was still hesitating, it was then that I started swapping parts to see what else could have gone wrong, but till now I cannot figure this one out on my own so I really need help. My computer is down for repairs so I may not answer reply as quickly as I want but I will try my best. I really appreciate any help that you all can offer and I apologize for being so long here. Thanks again.
I am in serious need of some technical help. My 87 GN has developed a serious problem. While driving along it sometimes hesitates or stumbles or buck at low speeds but sometimes it is fine at low speeds. The real problem occurs while driving at around 60 mph or even accelerating to crusing speeds, then it hesitates and stumbles alot more. I have been interchanging parts to see what might have gone bad. I have not had any check engine light come on nor have the scan-master shown any codes or any readings out of alignment other than the speedometer on the car reading alot less than what the scan-master shows while driving along, but the car has had that problem before the hesitation thing came along. Well here is a list of the things that I have tried or checked or changed:
- Fuel Filter changed
- Fuel Pump checked
- Fuel Injectors changed
- Fuel Pressure stays up while hesitation continues
- Assume Fuel Pressure Regulator is fine
- Swapped Computer chip and Computer
- Coil Pack checked and swapped
- New Plugs and Wires
- Checked and swapped cam sensor cap
- Checked Crank Sensor - tight and no apparent damage
Well at first when it started I thought that i got a batch of bad gas or something like that, maybe water in the gas of such, so I drained out the tank and changed the gas and it was still hesitating, it was then that I started swapping parts to see what else could have gone wrong, but till now I cannot figure this one out on my own so I really need help. My computer is down for repairs so I may not answer reply as quickly as I want but I will try my best. I really appreciate any help that you all can offer and I apologize for being so long here. Thanks again.