Blackened87
New Member
- Joined
- Jun 21, 2016
- Messages
- 13
I just recently picked up a one owner 87 GN and I been having a issue with it. The previous owner said the car was sitting for a while so he got it running by installing new plugs, wires and a new coil. Once it started, it was running rough so he installed all new 30psi accell fuel injectors which he claimed solved the running issues.
It however did not help when driving. When I go above 5psi of boost, it starts breaking up and hesitating bad. I don't hear any pinging, just starts loading up and sputtering. I let off the gas and it has to catch itself to keep running.
The idle is better when warm then cold. The cold idle is rough and almost feels like it wants to stall, it's a little better when warmed up but not much.
So far I pulled all the plugs and saw that the gaps were way off at almost .050! I re-gapped everything to .032 and it runs a little better but still has the sputtering over 5psi. I picked up a good fuel pressure regulator and that didn't help either. I tried tapping on the MAF and the idle didn't change, I also ran it with the MAF unplugged and it ran worse.
My next plan of attack is to check the fuel pressure, change the fuel filter, and smoke check for vacuum leaks.
I installed a scanmaster and it starts working when driving, then turns off when stopped at a light. The information it's giving is inaccurate and all over the place so I'm thinking a new ECM is in my future. Also the engine cooling fans do not work, the relays look like they were replaced in a attempt to repair it, but it still didn't turn them on. A new coolant temp sensor is also in the works and I was planning on replacing the 02 sensor since it looks original.
Any other things I should consider or has anyone else experienced the same issues?
Thanks for any info.
It however did not help when driving. When I go above 5psi of boost, it starts breaking up and hesitating bad. I don't hear any pinging, just starts loading up and sputtering. I let off the gas and it has to catch itself to keep running.
The idle is better when warm then cold. The cold idle is rough and almost feels like it wants to stall, it's a little better when warmed up but not much.
So far I pulled all the plugs and saw that the gaps were way off at almost .050! I re-gapped everything to .032 and it runs a little better but still has the sputtering over 5psi. I picked up a good fuel pressure regulator and that didn't help either. I tried tapping on the MAF and the idle didn't change, I also ran it with the MAF unplugged and it ran worse.
My next plan of attack is to check the fuel pressure, change the fuel filter, and smoke check for vacuum leaks.
I installed a scanmaster and it starts working when driving, then turns off when stopped at a light. The information it's giving is inaccurate and all over the place so I'm thinking a new ECM is in my future. Also the engine cooling fans do not work, the relays look like they were replaced in a attempt to repair it, but it still didn't turn them on. A new coolant temp sensor is also in the works and I was planning on replacing the 02 sensor since it looks original.
Any other things I should consider or has anyone else experienced the same issues?
Thanks for any info.