Very Sloooooow S4 Na
#1
turbo probe GT driver
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Very Sloooooow S4 Na
ok guys, 120,000 on car new plugs, wires, air filter, fuel filter, ALL emissions removed, ps and ac removed, 6pi removed, new intake mani gaskets, no vac leaks that i can find. did a compression test a few hours after i last drove it, removed both leading plugs and held WOT, had 82psi on the front and 90psi on the rear.
now on to the problem, it has basically no power at all. you have to rev to about 2500-3000 to take off or it bogs out and almost dies, all gears are very slow, and you can really even use 5th gear. i could be 3000rpm in 5th and floor it and it does not rev up AT ALL. i do still have the 3.9 rearend from the auto trans, but i will swap over to the 4.1 as soon as i can. any ideas on why this car has no power?
now on to the problem, it has basically no power at all. you have to rev to about 2500-3000 to take off or it bogs out and almost dies, all gears are very slow, and you can really even use 5th gear. i could be 3000rpm in 5th and floor it and it does not rev up AT ALL. i do still have the 3.9 rearend from the auto trans, but i will swap over to the 4.1 as soon as i can. any ideas on why this car has no power?
#2
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did you have a noticeable power change AFTER you did the work to the intake or something? I don't really understand what you're getting at.... 82 psi is kind of low... 90 is borderline... N/As don't have much power to begin with; I don't know what you're used to or comparing it with... and 5th gear is almost useless in the N/A. If you need top-end acceleration, use 4th gear. 5th gear in my N/A was basically a "cruising" gear to keep the RPMs down : )
Josh
Josh
#3
82PSI is really quite low.
Are you sure the leading plugs are firing? Also, what condition are the plugs in?
I'd say it was a clogged cat, but you don't have one (right?).
Have you checked timing? I had a FC that ran like absolute crap, turned out I was a tooth off on the CAS and running something like 25-30 degrees retarded from where it should be.
-=Russ=-
Are you sure the leading plugs are firing? Also, what condition are the plugs in?
I'd say it was a clogged cat, but you don't have one (right?).
Have you checked timing? I had a FC that ran like absolute crap, turned out I was a tooth off on the CAS and running something like 25-30 degrees retarded from where it should be.
-=Russ=-
#5
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all the plugs are firing and the plugs are pretty new. it has no cats on it either. to give an idea how slow it is, my daily driver 95 escort wagon with 88hp at the motor would easily walk the 7. checked the timing and its fine. also could the 3.9 rearend be making a big difference?
#7
its your fuel injectors. Pull them and send them to cruzin to be cleaned/rebuilt and flow tested. One of your secondary injectors might be stuck wide open. This will cause a noticable power loss and black soot on your exhaust tip
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Originally Posted by white94pgt
all the plugs are firing and the plugs are pretty new. it has no cats on it either. to give an idea how slow it is, my daily driver 95 escort wagon with 88hp at the motor would easily walk the 7. checked the timing and its fine. also could the 3.9 rearend be making a big difference?
Baby it, rebuild it ASAP.
#9
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ok, so it loks like i have to do a rebuild on it, damn that sucks,
but i might hold off on it for awhile because my rx7 friends tell me that i need to drive it a lot and hard to build the compression back up. when i got the car, it didnt even run and the compression was like 70psi right after i got it to start, so it has already come up a good bit.
but i might hold off on it for awhile because my rx7 friends tell me that i need to drive it a lot and hard to build the compression back up. when i got the car, it didnt even run and the compression was like 70psi right after i got it to start, so it has already come up a good bit.
Last edited by white94pgt; 02-01-06 at 06:48 PM.
#10
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Well, it depends on your fuel system, if you have troubles with excessive flooding or a leaky injector, gas will lower compression and drive like *** as well. That and removing your aux ports isn't exactly the smartest idea in the world.
#12
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well the 6pi was seized up so i said screw it and took them out. it is still kinda hard to start, but not to bad. i have the fuel pump hooked to a switch, i just crank with it off of a sec or two then flip it on. sometimes i have to turn it on and off a couple of times to start.
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Originally Posted by white94pgt
well the 6pi was seized up so i said screw it and took them out. it is still kinda hard to start, but not to bad. i have the fuel pump hooked to a switch, i just crank with it off of a sec or two then flip it on. sometimes i have to turn it on and off a couple of times to start.
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well guys i just swaped in the 5spd rear end with lsd and it made a huge difference. i actually have a little bit of low end power now. i actually raced my friends mostly stock mx6 and i pulled a couple of cars on him, so it has got alot better. i will probally still get the injectors cleaned, and maybee a SAFC to lean it out a tad.
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Make sure and check the TPS as well...I had no power from 6-8k rpm in any gear after messing with the screw after we removed the 6 port actuators (straight 6port, no 4+2) so I knew something was off...same thing happened the other day when I messed with it and I know my car has top end power more than ever now, readjusted the TPS and now she flys...
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