I bought a 1986 325es autotragic, and I'm having a performance problem. Driving around normally up to 2K rpm, the car behaves fine. But if I press on the gas hard, it just doesn't go. One night when nobody was on the streets I really tried laying into it. It rev'ed to 2300 RPM, started bucking hard, and then suddenly shot up to 4500 rpm. When entering the highway it seems like it doesn't matter how much gas I give it - it just doesn't rev above 2K.
The other thing it does: It starts up great cold, but when warm I sometimes need to crank it ALOT. Also when starting cold, the first time I try to give it gas it stutters a bit, and then picks up. Once warm it runs fine up to 2k.
What I've done:
Checked for vacuum leaks
Replaced fuel pressure regulator
Replaced CPS and speed sensor
New Plugs (copper)
New cap and rotor
Removed both fuel pumps, replaced with in tank Tre Performance
Installed one way fuel valve at the pump
Valve job
New O2 sensor
ECU swap - chipped (non-ebay, real)
New Fuel Filter
I also think I'm getting pretty poor gas mileage. Hard to tell because I've been laying into it trying to figure out what's going on.
Any ideas on where to go from here? All I can think of is leaking / clogged injectors.
The other thing it does: It starts up great cold, but when warm I sometimes need to crank it ALOT. Also when starting cold, the first time I try to give it gas it stutters a bit, and then picks up. Once warm it runs fine up to 2k.
What I've done:
Checked for vacuum leaks
Replaced fuel pressure regulator
Replaced CPS and speed sensor
New Plugs (copper)
New cap and rotor
Removed both fuel pumps, replaced with in tank Tre Performance
Installed one way fuel valve at the pump
Valve job
New O2 sensor
ECU swap - chipped (non-ebay, real)
New Fuel Filter
I also think I'm getting pretty poor gas mileage. Hard to tell because I've been laying into it trying to figure out what's going on.
Any ideas on where to go from here? All I can think of is leaking / clogged injectors.
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