I've searched through a hundred of these and only a handful of them had a solution posted in them.. I'm having a bit of trouble with a 240 I bought running poorly.
-The car is a 93 Hatch with a Redtop.
-Ecu is for a Redtop.
-mafs is for a Sr.
-Stock injectors, stock fpr.
-3inch exhaust/dp.
-Meagen racing manifold.
-Fmic with DSM BOV.
-Walbarro fuel pump.
-Koyo alum. rad. w/one electric fan always hardwired.
For vacuum lines I have
-Small nipple above TB>t for boost gauge>FPR.
-Large nipple above TB> BOV only.
-Nipple under TB capped off.
-Vacuum fitting on IC pipe>Wastegate Actuator.
-T on valvecover goes into a catch can> catch can goes to intake, other side goes T into block.
-New check valve by master cylinder.
The car starts and idles with no problems. In neutral it revs up good, backfires sometimes when I let off. Car is making 18 vac at idle. Looked like the car made 8-9 psi under boost, which is kinda weird since I only have a stock actuator.
It runs good, pulls decent when its cold for a couple minutes. Then it warms up and as soon as you give the car more than 5% throttle it bogs down and doesn't want to go anywhere. When you get up to 4-5K rpm it starts to go decently hard now that I re-did the vacuum lines.
Haven't checked my timing yet, could possibly be something. The adjustment on the cam sensor, or whatever it is, looks to be 75-80% all the way one way on the right looking straight at it.
The car seems to have a battery drain issue as well, as well as the aftermarket stereo doesn't work. Not sure if this is affecting anything/part of my problem.
Let me know what you guys think I should do/check next on the car.
Things I have tried so far.
- Replaced coolant temp sensor.
- Put a used T25 with minimal shaft play on the car.
- Checked spark plugs and gapped them at .30 (They are NGKBR6KE's, I know they are a step cold but I don't think its an issue.)
- Re-did my vacuum to the setup above.
- Recirculated my BOV.
- Installed an air filter and clocked my maf so the plug is at the top.
- Pressure tested the coolant system, noticed a 3psi drop after 45 minutes, also noticed whitish gray smoke in exhaust only on start up - possible head gasket issue.
- Installed a 300zx fuel filter.
- Fixed a mostly broken TPS wire and set my TPS to .49 closed and 4.18 fully open.
- Checked maf voltage its at .80 key on and 1.56 at idle (I think this is out of spec.)
- Getting 4.87 volts to the coolant temp sensor.
- Compression test cold, 150, 142, 152, 154.
- Wired in a new plug for the mafs, and cleaned the sensor.
- Cleaned PVC on vc.
- Swapped FPR and injectors.
- Warm compression test, 154, 150, 152, 154.
- Got a used sohc maf and pigtail and tried that.
- Looked at fuel pump/filter. Filter looked good, no debris in the tank.
Heres what my plugs look like.
