Sacker90

When I give it enough gas or around 4.5k i lose total power(as if im gettin too much or not enough fuel from the secondaries), Here recently after i let it warm up and turn it off it will not start back up and sometimes backfire, but an hour or so later it'll start rgiht up and smoke(as if its flooded). The car feels like its got a lot more power when its cold, but when it warms up it loses all power when secondaries are suppose to kick in, I also catch around 6 psi of boost..Injectors are plugged up, i am running pfc with base map, stock injectors, and re-wired supra fuel pump...thanks

dgeesaman

iTrader: (7)

You must remove the injectors and get them tested/serviced. Do it soon. FD injectors are too fussy and too critical to settle for anything less.

If you don't have a week to wait for your own injectors to come back: I was able to buy a set of freshly cleaned injectors (from Japan2LA, IIRC) and sell mine after they were cleaned.

If they're sticking, you're not getting the fuel delivered that the ECU is counting on. Since you are able to get boost, you are also able to blow your motor if you go lean under boost. Although one injector might be dumping rich so that the smoke/flooding suggests a richness problem, remember another injector might have the opposite problem and still blow your motor.

Sacker90

The injectors were cleaned/serviced back in march of '05 and haven't been used too much since then, so I didnt think that could be the problem...

RotaryResurrection

iTrader: (8)

So wes...did Howie happen to tell you about the 45psi compression test we ran on that engine? I am willing to bet that he left that part out.

IF this thread goes like his normally do, everyone will post suggestions and wes will dismiss each of them immediately saying "it's already been done" and then get pissed that no one is helping. lol.

mwpayne

45PSI?? I told him just last night about hard warm starts=low compression. I was under the impression that the engine had a recent rebuild.

Crap....

Kev, would you do a quickie compression test one day this week if he runs it up there? We need to know where we're at...

RotaryResurrection

iTrader: (8)

That was the engine that I built about 1.5 years ago for my car. I "broke it in" at deals gap then 2 weeks later another guy talked me out of it. He did who knows what with it then howie got the car back. And we know what all howie did with it, including the time we took it out for some runs and it was hitting 16-18AFR under boost because of a loose hose. It tested 85/45. I lend a lot of it to the fact that it has RA apex seals, which some guys have reported lose compression and strip the chrome off the housings in 10-20k miles....and that's right at the place where this one is.

IF you just want an overall number, a piston tester will work fine for you with the valve still installed. Warm it up fully, remove the EGI fuse, and remove one plug per chamber (I'd use the upper holes on an FD). Test for 10 seconds, and repeat on the other chamber.

mwpayne

So, if I understand correctly, the engine was rebuilt about 20k ago using the RA seals. These seals may have stripped the chrome from the housings, resulting in the low comoression. It's not the typical worn out apex seals, so 'theoretically', since the seals themselves aren't worn, the car could go as is for a good while, right?.

Mahjik

iTrader: (1)

If the car is only building 45 PSI on one housing, it's never going to run well.

RotaryResurrection

iTrader: (8)

IT can continue to go until it becomes unreliable due to starting and idling issues, which is where low compression shows up.

mwpayne

Good enough, at least he can drive it. Now, though, he wants a corvette.
See what happens when you just can't put 'it' off long enough for a short drive to a drugstore?? "I can't believe that he come from my loins..., I'm gonna go home, and kick his mama in the butt."