suzukispeeder

Ok I have a 93 lx with cam, gt40 intake 24# inj, 70mm TB, 73 mm c&l mass air tube, X3z computer. Car has been running rough since I got it wanting to cut out at 5000 in 3rd, 3500 in 4th, 2500 in 5th really running rough when car is under load, it runs out fine in 1st, and 2nd. Ok never thought it was a fuel pressure problem because guage never dropped, but messing around this weekend and noticed that the vacuum line wasnt hooked to manifold but to egr spacer water ports. Ok so got that fixed and now when it cuts out the fuel pressure goes from 40 to around 20 so I'm wondering what you guys suggest I try to fix first, pump( is stock because the 155 that was in it cuts on and off), filter, and I also suspect that one of my injectors are bad because the cylinder is not combusting like the others could this cause my problem, also the rest of the cylinders are running way rich if I'm loosing fuel pressure shouldnt I be leaned out. I'm going now to change the filter cause I already have a extra one.


Thanks for all the future advice.

aode08

ORIGINAL: suzukispeeder

Ok I have a 93 lx with cam, gt40 intake 24# inj, 70mm TB, 73 mm c&l mass air tube, X3z computer.

what is a x3z? get your a A9L

---Car has been running rough since I got it wanting to cut out at 5000 in 3rd, 3500 in 4th, 2500 in 5th really running rough when car is under load, it runs out fine in 1st, and 2nd.

Ok never thought it was a fuel pressure problem because guage never dropped, but messing around this weekend and noticed that the vacuum line wasnt hooked to manifold but to egr spacer water ports.

Get us pictures of this above
Ok so got that fixed and now when it cuts out the fuel pressure goes from 40 to around 20 so.
Ignore that

I'm wondering what you guys suggest I try to fix first, pump( is stock because the 155

----that was in it cuts on and off?????), filter, whats in it now? you say this was happening every since you got the car.

I also suspect that one of my injectors are bad because the cylinder is not combusting like the others could this cause my problem.

what evidence do you have

Also the rest of the cylinders are running way rich if I'm loosing fuel pressure shouldnt I be leaned out.
what evidence do you have?

I'm going now to change the filter cause I already have a extra one.


Thanks for all the future advice.


We need pics of your engine bay, this whole scenario, is twisted

suzukispeeder

how can you ignore the pressure dropping 20 psi when it drops at the same time the car is cutting out

x3z( cobra computer)

stock fuel pump

car didnt run at all when I got it

yea I know its twisted Ive been messing with it for 3 or 4 months off and on. I knew I shouldve stuck with GM vehicles, but I guess you never like what you don't understand

Its been a fun car what I can get out of it I really wanna see what it will do when it runs right.