I have an OBD1 S52 that's has been acting strange. Above 3500 RPM it runs consistently strong and as expected. Below however, it somewhat erratically runs like its missing one or two cylinders. Down on power, distinctly different exhaust note. If I stay on the throttle when it does this, as soon as it passes 3500, it wakes up and acts normal.
In trying to troubleshoot this, I have checked most of the sensors under the manifold. Throttle posi and intake air temp checked out. DME coolant did not and knock sensors were looking shabby so I replaced those three. I also used some MAF cleaner on the MAF and cleaned the throttle body. No change.
Is there something in the DME logic that changes at 3500?
97 S52 100k mi before swap, less than 3k since (I did not always behave like this.)
Racers market OBD1 for 93 octane, 3.5" euro maf, 24lb injectors, LTW flywheel idle bump.
Anyone else experience this before? Tips on where to look next? I'm stumped.
Thanks in advance R3vers, I believe in you!
In trying to troubleshoot this, I have checked most of the sensors under the manifold. Throttle posi and intake air temp checked out. DME coolant did not and knock sensors were looking shabby so I replaced those three. I also used some MAF cleaner on the MAF and cleaned the throttle body. No change.
Is there something in the DME logic that changes at 3500?
97 S52 100k mi before swap, less than 3k since (I did not always behave like this.)
Racers market OBD1 for 93 octane, 3.5" euro maf, 24lb injectors, LTW flywheel idle bump.
Anyone else experience this before? Tips on where to look next? I'm stumped.
Thanks in advance R3vers, I believe in you!
Comment