boostmotorsport

I have an 87 T2 with a jspec motor. It revs rough and hesitates when I try to rev it up slowly in neutral. But revs fine when I go full throttle. The same goes for when driving-accelerates fine, but mid and low throttle is rough. BUT this only happens below around 3000 rpms (bad primaries?). I have tried injector cleaner too. My pedal is practically an on/off button when driving! I already readjusted the tps, and tried another one. I have a safc, intake exhaust etcetc. Could it be bad grounds? Its really annoying, and I have been living with it for about 6 months! My boost guage reads 15 lbs vaccuum at a 800rpm idle so I think a leak is out. it also idles crappy till fully warmed up(removed cold start), and misfires a bit while idling. Also how do I reset the ecu? Also safc is set at 5% low throttle, and 85% high throttle, is this wrong?

I tried the following-

-different tps, and readjusted
-searched for vac leaks(none)
-cleaned/replaced plugs
-injector cleaner


possibilites(maybe)-

-dirty/faulty primaries
-bad grounds from motor/ecu
-timing off
-still a vac leak


Any ideas? Ted, anybody?

boostmotorsport

ttt

RETed

Have you done the throttle body mod?


-Ted

boostmotorsport

yup, but I had the prob just the same before I did that

RETed

Spec the TPS's - they both could be bad.
Dump a can of brake fluid into the airflow meter - it could be dirty (AMF removed!)
Add more grounds - you could have a ground problem
Spark plug wires original?&nbsp Change them out


-Ted

boostmotorsport

Ill try those things, thanx ted, but brake fluid? should I just blast the insides of it with brake cleaner or something?

RETed

Oops, crap - typo!!!
"brake cleaner"!!!
Don't be dumping brake fluid on anything in your car except in the brake master or clutch master reservior!
My bad!



-Ted

cymfc3s

little too late now pal!!! Thanks alot!! have you any idea what a mess the brake fluid made???? Jeesus christ!!!!!!!!

boostmotorsport

Ted youll be happy to know that between those 2 posts of yours my faith in you didnt even waiver! And cymfc3s is right after I tried you brake fluid trick my car seems to run REALLY rough, trying mt 90 in the afm tomarow, thatll fix it up good!

Fingers

hmmm... that sounds unhealthy... but here's my tidbit
i experienced the same issue (before my rebuild). It seems as though my fc was running rich as a ****. (130km to a gas tank) After the rebuild, the revs are much smoother. I'm not saying that you need a rebuild... perhaps just adjust your air/fuel ratio. Worked for me