Yet another running rebuilt CA, need help

[XTCshri2222]

alright, it's running and driving. But there are so many bugs. The car has extreemly slugish acceleration. I put in a brand new s15 spec R GT28 and it's spooling great, but i hear the waist gate fluttering at 1500. Car has tomei cams, KA throttle body, 550cc injectors, I have a n60 maf i'm not installing till the car is running "acceptable" to limmit problems.

I think timing may be off.. any ideas? the car just feels so slow, slower then it did when it was stock without a t28, tomei cams, big injectors, and a TB. I think i'm running rich, i did lean it out with the safc, and my A/F gauge is showing Ideal, but i'm still shooting fuel smelling smoke out of the exhaust...

My oil pressure on start up cold is 50psi, then at 3000rpms is 75 psi. Once warm it slowly drops pressure to 20psi, and then flys back up under revs. Is this a good oil pressure?

This is my most hated part of the whole car, trouble shooting. Wish i could just stick to bodywork.

[slo]

Sorry you're having so much trouble...

Usually I tell people to start from the beginning but with you, I wouldn't know where to begin since you seem to have many mods. I'm new to ca18det as well and I just got it running and it's running very well. No bugs yet... knock on wood... I'm going to get my oil pump replace in a few days though. Valvetrain seems a little noisy at lower rpms...

Good luck, dude. I'm sure someone on this board could help you out.

[XTCshri2222]

yea alot of mods, anyone have feed back on emance's ecu tunes? i was planing to get the nistune from aus, but i'ed still need to find someone to tune it properly.

[mbmbmb23]

alright, it's running and driving. But there are so many bugs. The car has extreemly slugish acceleration. I put in a brand new s15 spec R GT28 and it's spooling great, but i hear the waist gate fluttering at 1500. Car has tomei cams, KA throttle body, 550cc injectors, I have a n60 maf i'm not installing till the car is running "acceptable" to limmit problems.

I think timing may be off.. any ideas? the car just feels so slow, slower then it did when it was stock without a t28, tomei cams, big injectors, and a TB. I think i'm running rich, i did lean it out with the safc, and my A/F gauge is showing Ideal, but i'm still shooting fuel smelling smoke out of the exhaust...

My oil pressure on start up cold is 50psi, then at 3000rpms is 75 psi. Once warm it slowly drops pressure to 20psi, and then flys back up under revs. Is this a good oil pressure?

This is my most hated part of the whole car, trouble shooting. Wish i could just stick to bodywork.

My guess would be timing. Do you have cam gears?

-m

[XTCshri2222]

no cam gears, i was ordering them, but then couldnt get them, my cams are very mild, 256 tomei poncams

[bentvalves]

I suspect timing belt off a tooth, or CAS too far retarted.

I suggest the following.

stock ECU + SAFCsome sort of boost controlWIDEBAND 02timing light

What else has been done to the motor should have been my first question?

[XTCshri2222]

motor mods are:

FMICKA throttle body550cc injectorstomei 256 camsrebuilt new bearings rings, machinedgarrett gt28rs spec r3"exhaust turbo backss auto manifild n60maf - not installed i am running stock ECU unchiped with safc2

right now boost is at stock settings for a s15 spec r, think it read 6-8psiright now i have a -2 correction on the safc for the 550cc injectorsnarrow band a/f reading ideallifters make chatter occasionaly I think i have vacume leak also, running 10 psi of vacume and sometimes 20. I know it should be 22-25 psi of vacume I also am shooting smoke, sometimes very heavy smells like fuel. Think that is also causing a lil bit more then normal water out the exhaust.

boost controle and frp are already in the mail.
Modified by XTCshri2222 at 10:12 PM 12/24/2007

[bentvalves]

get a constant vacuum established first.

shoot your timing.

get a real 02 sensor to monitor AFR's.

[float_6969]

I suspect timing belt off a tooth, or CAS too far retarted.

+1Try redoing your timing belt. I did mine once and I SWORE it was on there right. I tried everything I could think of. Finally pulled the belt back off, put it back on again and it ran perfect.

Many others have had the same experience. Same symptoms as well.

[MeanGreenS13]

when i did my engine it took me 3 times to be 100% sure i put the Tbelt on right,

[mbmbmb23]

motor mods are:

FMICKA throttle body550cc injectorstomei 256 camsrebuilt new bearings rings, machinedgarrett gt28rs spec r3"exhaust turbo backss auto manifild n60maf - not installed i am running stock ECU unchiped with safc2

right now boost is at stock settings for a s15 spec r, think it read 6-8psiright now i have a -2 correction on the safc for the 550cc injectorsnarrow band a/f reading ideallifters make chatter occasionaly I think i have vacume leak also, running 10 psi of vacume and sometimes 20. I know it should be 22-25 psi of vacume I also am shooting smoke, sometimes very heavy smells like fuel. Think that is also causing a lil bit more then normal water out the exhaust.

boost controle and frp are already in the mail.

Modified by XTCshri2222 at 10:12 PM 12/24/2007

FPR? Fuel pump?

[XTCshri2222]

fpr = fuel pressure regulator

[mbmbmb23]

fpr = fuel pressure regulator

Do you have an aftermarket fuel pressure regulator and fuel pump?

[XTCshri2222]

yea, i have a walbero 255, aftermarket fpr is on its way. I got megan's fpr, since it has 1/8 ports i can screw in my remote fuel pressure gauge an run it into the car.

[XTCshri2222]

looked at the timing belt and marks on the gears all seem to be in the right place..

[float_6969]

Even the bottom one on the crank?

[XTCshri2222]

hmm didn't check that one , i'll check that tomarrow