I was told that its possible that my car has bad compression due to my major power loss. are there any noticeable signs of bad compression?

Also,
I had it scanned and i only got a P1336 code, for "Manufacture control ignition system or Misfire" but the book said that was a bad Crankshaft position sensor.

Im wondering if it was that, why is the car starting properly?

it has only happened in the last few weeks. but the power loss is major.

Switching my MAF today with one i KNOW is working properly to see if that makes a difference.

My list of things to check consist of:

Vaccum check(ran good awhile ago though)
MAF
CPS
Fuel PSI
Oil PSI
Rear Coils(00vi swap)


anything else i need to check?

 

Ever think of a compression test? . Get the coils/MF/CPS checked out. Compression is very unlikely to go 'bad' (read low) on these cars unless something catastrophic happens (ultra lean condition), hole in piston etc.

Go to AutoZone, buy compression tester, read label, follow directions, perform, report back. In the meantime, search on here for exact specs (range) so you know where you're at.

 

power loss due to those boat anchors

 

ok, thanks Nmex, your one smart N/A guy..lol I planned or renting the tool tomorrow... a vaccum leak can cause lean conditions right?

 

i ran with 16" SSR's on the front and Sawblades on the back FYI

 

sorry, didnt realize there was any running happening

 

#1 thing to check is your knock sensor.

 

Sensor check/verification is ALWAYS the #1 thing that should be looked at.

 

sorry, continue with the productive comments.

 

A sensor check should always be on order before a CT. A CT should be performed, IMO, if the engine has seen excessive RPM, ran excessively lean, (FI/N2O/ even NA), has been bought from someone &/or a company used, etc. Pretty much after all sensor checks have been checked and passed. Or, just for the heck of it for general knowledge and diagnostic of your car.

 

Ok, I will check the KS but im sure thats fine..

Back in after a little testing with a fellow 95 5spd with full exhaust, test pipe & intake.

My MAF was good. It seems like he pulled on me 2nd-3rd shift and on. So i take it, its my mid-range and topend that is hurting.

I took off the ENTIRE 00vi setup.. my Upper IM ports smell like unburnt gas.

My Rear(2000-01) Coil Packs are good(checked with a voltmeter)

I highly doubt its my KS, it was changed about 20k ago and my car doesnt feel as dead as it did when it was bad(just for reference, whats the volt reading suppose to be on it?)

 

I want to say 550k ohms (and a 470k resistor will do the trick ) can someone confirm?

 

Also, to clear this debate up with my brother, would a bad o2 sensor cause this much of a power loss? No codes for them but if anything, the one in the cat "MIGHT" be bad.

 

i remember reading about that 470k resistor bypass. Didnt make a difference unless i was suppose to put it on the end of the harness that the knock sensor connected to and not the other end(i put the resistor right into the main harness, by the front valve cover, atop the coolant tube)

 

confirmed, 500-640 IIRC but the 470k resistor does work.

 

No, your symptoms seem to be happening during open-loop control, aka 02 sensor aren't used during that time. A bad cat could though. Run through everything else first though, ie sensors, injectors, coils, vacuum & ct before drilling a hole & measuring your exhaust pressure before the cat w/that vacuum gauge, assuming it reads pressure obviously.

 

Ok, Ill place order on a test pipe (im still using the factory cat). Ill also do the pressure test and check the vacuum and injectors.

If its not asking too much, could someone recommend the sensors that i should check?
(I know of the o2, KS, MAF)

Thanks,
Aaron