Hi guys... I had bad gas in my 1990 N/A but I have drained most all of it out a replaced it with new.. So my next guess is Fouled plugs or plugged up injectors..
I have already checked the fuel filter it is fine.. there is also fuel pressure... because it squirts out pretty good when I unhooked the filter.. Do ya think it could be the Pentium intake could need cleaned..??
When its cold it is rich on the driverside an after it gets warm it switches to passenger side.. Any ideas fellas..
I have been trying to finger this thing out for some time... I don't know really what to do.. IM GONNA REPLACE THE MASS AIR FLOW NEXT..
No Power or RPM???
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leerandallstewart
- Posts: 72
- Joined: Sat Oct 24, 2009 4:40 pm
- Car: 1993 300ZX, 1987 300ZX, 1988 300ZX Turbo
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Re: No Power or RPM??? (vape-one)
Things I would do (not necessarily in this order) but it's the order I would check. Eliminates potential causes as you go along.
First, look at timing.
Then re-check the fuel pressure. Just because it squirted does not mean that it is adequate.
Do a "double shot" of injector cleaner or Sea Foam - then replace the plugs (assuming that all of your coil packs are firing).
A good cleaning of the throttle bodies on the upper plenum could never hurt, but I doubt that would cause the car to not have any power. I would check the air filters though. If they are clogged, the car can't breathe.
First, look at timing.
Then re-check the fuel pressure. Just because it squirted does not mean that it is adequate.
Do a "double shot" of injector cleaner or Sea Foam - then replace the plugs (assuming that all of your coil packs are firing).
A good cleaning of the throttle bodies on the upper plenum could never hurt, but I doubt that would cause the car to not have any power. I would check the air filters though. If they are clogged, the car can't breathe.
Re: No Power or RPM??? (leerandallstewart)
---I have checked each plug for fire an everyone was.. I heard if fire is red an not blue tho it was considered a weak plug/coil.?? True or false??
Also there is only a air box.. No filter in it..
The thought of cleaning the throttle bodies has crossed my mind a few times tho.. If I take CAS off .. as long as I only just take bolts out of unit that attaches it to engine it won't screw up time will it?
Also the timing light that I have access to is one that plugs into the wire.. In the manual it says to use a high tension wire...
Will an old spark plug from another car work?? I would think so..
The fuel that was in the z was a year an a half old with little pieces in it.. I of course drained some an put a half gallon or so of fresh to it... I need to see if the injectors are clogged.. How do I do this..????????
Thank you for your time leerandallstewart...
Also there is only a air box.. No filter in it..
The thought of cleaning the throttle bodies has crossed my mind a few times tho.. If I take CAS off .. as long as I only just take bolts out of unit that attaches it to engine it won't screw up time will it?
Also the timing light that I have access to is one that plugs into the wire.. In the manual it says to use a high tension wire...
Will an old spark plug from another car work?? I would think so..
The fuel that was in the z was a year an a half old with little pieces in it.. I of course drained some an put a half gallon or so of fresh to it... I need to see if the injectors are clogged.. How do I do this..????????
Thank you for your time leerandallstewart...
Re: No Power or RPM??? (leerandallstewart)
-- So I have done everything simple as far as checking spark an coils that I could do ! Tonight I decided to pull the plenum an saw that everywhere it was black... I dug all kinds of gunk outa this EGR tube the passenger side was almost completely clogged..(AS FIRST PIC SHOWS) My neighbor helped me pull it an it took about 2half hours... He said something about Catalytic Converter may be plugged... Does this tube run to EGR valve an I am wondering how bad it may be plugged up?? Any suggestions guys??