sprocket_3

I can't get my 88 gxl started and I think its because I have a leak at my manifold. It is also straight piped. I was wondering if that could be causing low compression and aiding my flooding problem because i haven't even had a chance to hear it run since I got it. It's driving me nuts so If you have any suggestions please help me out. Thanks.

blackedoutFC3S

iTrader: (7)

so is it currently flooded or you've unflooded it and now it still wont run?

sprocket_3

I tried unflooding it every way i've found on the internet and it still won't start. It will stumble sometimes and rarely fire and when it does it revs real fast to 3k and shuts off.

blackedoutFC3S

iTrader: (7)

you pulled the EGI fuse and cranked it and cleaned the plugs?

and does it sound like its currently flooded or does it sound like it just wont start up?

certifiednut

double check to make sure your afm is plugged in, its attached to the back of the airbox, at one point i had left mine unplugged and it would do that exact thing

blackedoutFC3S

iTrader: (7)

ugh i did that once too... and i didnt have my intake screwed in all the way so that didnt help either ha

sprocket_3

If the afm is the wide connector on the metal part of the airbox then it is plugged in but the connector is worn and cracked. I have been in this forum every night for at least the last 4 weeks trying everything suggested. I'm really at a lost. I have a friend thats coming over today to check my compression. I have new plugs wires I checked spark its fine I have a new fuel pump and its priming. I have a set of injectors on the way but I was wondering if because it has a leak at the ehaust manifold if thats why it could possibly have low compression.

blackedoutFC3S

iTrader: (7)

injectors shouldnt cause low compression... and do you know 100% you have low compression or thats why you think it wont start?

sprocket_3

I don't know for sure but I think thats why the motor might be toast I don't know yet until I do a compression check.

sprocket_3

I can get it fired now but it will only fire for a few seconds and then shut off. It usually gets to 3k or so then it will just stop firing.

Polishammer

If it fires revs to 3K and then dies, you might have a big vacuum leak. Then you flood it with constant cranking and it cant start. Check you vac hoses.

sprocket_3

I can get it to 5.5k and then it dies but it will only start if I have my foot on the gas a little and then no matter what I do it starts to rev to 3 and then if I have my foot all the way on it it will make it to 5.5 but It immediatly cuts I don't know if its a fuel cut, air cut, or a lack of spark.

MmSadda

iTrader: (2)

^you need to re-read what he said, and check your vacuum lines

MmSadda

iTrader: (2)

By the way, that doesn't inherently sound like a compression problem to me. I had a blown apex seal, and the car was still able to start up and drive. All of that was horribly jerky, but at least it started up and stayed there....

sprocket_3

The guy I bought it from removed the air pump and checking all the lines have been a night mere and there is no one around me with one I can look at. It sucks. out of curiosity where do the three lines that come off at the throttle go to I know the top one goes to the omp injectors which the genius that I bought it from disconnected and threw away the four way connector. I don't know where the middle one goes. I think the bottom one is like 3 inches and it goes to a brass connector.

sprocket_3

I appreciate the help guys

MmSadda

iTrader: (2)

^not sure about your last question, but you should probably search for the Factory service manual, which I know some people here have in their sigs, and use that for reference. Also, buy a Haynes manual, if you haven't already... that could likely help, too.

sprocket_3

I checked both and the middle one runs off behind the diagrams and they don't ever show it.

RotaryRocket88

iTrader: (7)

The front 3 vac lines on the S4 plenum go to the oil injectors, anti afterburn valve (back side of the LIM) and the emissions rack. The emissions rack connection splits off and goes to the EGR, relief and switching solenoids.

Search for "colored vacuum diagram" and you'll find some FSM images that people have colored in so you can actually tell where lines go.

sprocket_3

I just went through and took off my manifold and replaced all the lines according to a vac diagram and It is still doing the same thing. I contacted pineapple racing and their mechanics have never heard of suck a problem but they think it might be a vac issue too. I don't know I'm at a loss

Polishammer

Here is the manual:

http://www.teamfc3s.org/main/factory...ual/1986_1988/



Since you mentioned air pump, make sure the lines are properly terminated. Also there are two air lines that come from air cleaner duct that go to the manifold, make sure they are connected.

sprocket_3

I have the big one connected but the little one is plugged off where does it go to?

somebody5788

Keep searching for a vacume leak as that sounds like the biggest possibility in my mind. On the other hand it does sound exactly like an afm thing too. When I got my engine installed at first I didn't have an afm but wanted to know that the engine ran so I tried it. It was hard to start and flooded easy and would do exactly what you described rev to 3k then die immediately.

sprocket_3

the afm was jammed at first and then i loosened it but it could be broken

sprocket_3

unjamming it didn't fix it and i called mazda and a reman. is $1200.00.