Hello everyone, having a issue wondering if anyone has run into this before.
So the car is a 87 325is, I swaped I'm a 91 M42 I had bought for another car.
Got the car running this weekend and when it idles it's about 1-1.3k but when I try to rev it, it revs up to about 2.5-3k then falls on its face and if I keep the throttle open it will bounce back up then back down like a really lazy two-step. The car isn't triggering a check engine light yet.
I have checked the tps seonsor and it check with in spec as well as the plug showing 5v. No difference when unplugged
If the AFM is unplugged it will throw a cel light and stumbles. The AFM door swings freely and apears to be operating correctly.
IAC again will throw a check engine light when unplugged however not a noticeable difference when unplugged.
I am still utilizing a external filter the 87 came with, i can hear it prime and apears to be working. I do have a internal from a 318is that I have not swaped in yet.
I swaped o2 sensor just to eliminate it and it did not change anything.
I'm starting to think it's ignition related, I'm currently running m42 coils and some spare m20 wires. I was planning on going COP so I'll probably order that in the next few days.
Plugs were relatively new, and the fuel filter came with the car but looked relatively new (I'll be replacing that soon).
any help will be greatly apriciated.
So the car is a 87 325is, I swaped I'm a 91 M42 I had bought for another car.
Got the car running this weekend and when it idles it's about 1-1.3k but when I try to rev it, it revs up to about 2.5-3k then falls on its face and if I keep the throttle open it will bounce back up then back down like a really lazy two-step. The car isn't triggering a check engine light yet.
I have checked the tps seonsor and it check with in spec as well as the plug showing 5v. No difference when unplugged
If the AFM is unplugged it will throw a cel light and stumbles. The AFM door swings freely and apears to be operating correctly.
IAC again will throw a check engine light when unplugged however not a noticeable difference when unplugged.
I am still utilizing a external filter the 87 came with, i can hear it prime and apears to be working. I do have a internal from a 318is that I have not swaped in yet.
I swaped o2 sensor just to eliminate it and it did not change anything.
I'm starting to think it's ignition related, I'm currently running m42 coils and some spare m20 wires. I was planning on going COP so I'll probably order that in the next few days.
Plugs were relatively new, and the fuel filter came with the car but looked relatively new (I'll be replacing that soon).
any help will be greatly apriciated.
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