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S Chassis Technical discussion related to the S Chassis such as the S12, S13, S14, and S15. |
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06-07-2013, 01:15 PM | #1 |
Leaky Injector
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Another BOGGING thread :).
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. Last edited by Twiglet240; 07-01-2013 at 11:18 PM.. |
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