sr20det mis-firing

For the RWD SR20DET cars! Sponsored by Wiring Specialties.
bestlowrida
Posts: 54
Joined: Sat Nov 06, 2010 5:17 pm
Car: 92 nissan 240sx
99 estoril m3 vert
92 325i-sold
99 eclipse gs-traded
92 volvo 850-totalled
92 300zx tt-sold
93 240sx se-sold
89 535i-sold
92 honda accord-sold

Post

Hey Guys

I been reading and reading on forums for about 6 months getting my redtop running strong. I finally had it running almost to were it was time to take to get it a professional dyno tune but it recently took a dump on me :-(. I recently replaced
-z32 fuel filter
-ngk bk7 iridium v-power plugs w/ 32mm gap
-walbro 255 fuel pump
-coolant sensor
-10w 30 royal purple oil

The car came with extra set of red jecs fuel injectors, I was curious to see wich injectors was on the car and popped on out and the apppeared to be the jecs purplely grey stock injectors i guess? I put it back in the rail and drove around holloween night for about 30 minutes and stopped to get gas and the car did'nt start up. I towed it home and found that the o-ring in the injector had flattened out and allowed gas in the cylinder which of course flooded the engine.I popped in one of the extra injectors and VOILA problem fixed right......wrong! I got all the gas out, replace new plugs and oil. The car started up but now mis fires, no power at all, it feels like it runs on 2 cylinders. I pulled the coils while car running and they all were good, switched them around and funny thing is that nothing changed. I checked the maf and the voltage is at .83 with the key on and started it was around 4 and climbs as increased rpms. The car idles and revs fine but barely accelerates. Im very sorry about the long post I just dont know what else to do. Any help would be appreciated in advance!

By the way my car has the following:

Apexi power fc
t3/t4 turbo
greddy bov not sure which one came with the car
blitz turbo timer
3' full exhaust
fmic
j30 diff


User avatar
rustest86
Posts: 308
Joined: Mon Aug 29, 2005 8:19 am
Car: 93 240 coupe SR20DET Greddy T518Z, Tomei 256* poncams, sti injectors, and fmi
Location: Lake Charles, LA

Post

ok so that im understanding right, you installed one of the red injectors because the o-ring was bad on one of the purple one's? if so thats your problem right there. the red ones are 270cc and the purple ones are 370cc. its not getting enough fuel. order a set injector o-rings for it, and put the purple injectors back in it. if the pentle caps are broken those need to be replace because they hold the lower o-ring on. and those are a dealer item.

bestlowrida
Posts: 54
Joined: Sat Nov 06, 2010 5:17 pm
Car: 92 nissan 240sx
99 estoril m3 vert
92 325i-sold
99 eclipse gs-traded
92 volvo 850-totalled
92 300zx tt-sold
93 240sx se-sold
89 535i-sold
92 honda accord-sold

Post

rustest86 wrote:ok so that im understanding right, you installed one of the red injectors because the o-ring was bad on one of the purple one's? if so thats your problem right there. the red ones are 270cc and the purple ones are 370cc. its not getting enough fuel. order a set injector o-rings for it, and put the purple injectors back in it. if the pentle caps are broken those need to be replace because they hold the lower o-ring on. and those are a dealer item.
This is why I like these guys on here, I did as the above stated and car drives better then ever! I really do appreciate your time to help me out!


Return to “SR20DET Forum (rear-drive)”