user 797w349o

1990 GTU does not seem to want to start, although My mechanic (a friend of family) sprayed a small amount of ethanol in the air intake and it started immediately then stalled, he also checked the fuel pump, but that seemed to be in working order, he told me to look up info on the EGI fuse relay, and he thinks its either fuel injectors not putting out enough psi, or clogged fuel filter, a haynes manual doesn't seem to help me with this as i'm not too inclined with mechanics yet

Pele

iTrader: (28)

See if your mechanic has a fuel pressure gauge.

There are two fuel pressure hoses. They are on the driver's side of the engine, just in front of the oil filter..

See if the fuel pump is putting out enough pressure.

rotaryfreak7

ive got the same exact problem with my 7 it starts up when the key is held to start but as soon as i let off the car dies about 3 seconds later mine sat for a long time i took it into the shop they checked everything and it all went well until the fuel got to the injectors i took them out and am waiting to order new ones did you happen to find out any info?

Dr1ft@gious

sounds like an ignition problem here.

rotaryfreak7

no its definatly not an ignition problem its almost like as the key is held its forcing fuel through but once let off it stops forcing it

sadrmmr04

iTrader: (1)

explain more...so you have the key to the "ign" position and as the car starts you let go and when its in the "acc" position it will die? check voltage to the pump when after the car starts. or try this, run a straight 12v constant to the pump to see if the car will idle.

jcblack

I really hope u figure it out bud. I had a similar situation myself but it was a bad fuel pump. I would definitely check the fuel filter. Good luck

rotaryfreak7

ok so i think it may have to do with fuel thats what the shop told me but i wanna get a bunch of ideas before i start lookin for new injectors the shop seemed to think it was the injectors because it sat for a while too but as i would hold the key it would start up but once i let off the key it idled for about 3 to 4 seconds then died so its fuel injectors or something with fuel the fuel pump is good its all good but they seem to think injectors since it sat but i would like to maybe figure it out before i spend a good amount of money and wheres the voltage pump at i need to buy a new book for my car but thanks for your ideas i appreciate it man

cab91089

iTrader: (3)

try pulling the egi fuse and leading spark plugs and crank the engine for 3 - 5 seconds and put the spark plugs and egi fuse back and try starting it. the engine may just be flooded but it could be something else too. it just sounds similiar to the problem i had and it never hurts to try.

user 797w349o

hey everyone thanks for the input, we checked the pump again, and tried to start the car, we started it a few times, right after it started it would rev to about 2-1/2 to 3k for a few seconds then stall, i believe it may either be an ignition problem or the injectors are not pushing enough psi, we have yet to test those, but i will first need a new battery as even trying to jump it killed the battery and almost killed the alternator of the vehicle we were getting a jump from, we removed the hoses from the pump and cranked it quickly, only to find out that one of the hoses wasnt getting any fuel, ill try to keepyou guys updated on what we do next

user 797w349o

ok, my friend has told me to look for the distributor cap, and thinks that there may be something wrong with the timing, so i have yet to look into that, but i also remembered my mechanic telling me to look up info on the fuse/fuel? relay, i found the relay below the steering column, but as i haven't checked it out yet, i dont really know what to do, me and my friend spent a day to work on it and try to figure out the problem, and one of the fuel hoses was working, and the other one wasn't spraying anything, im pretty sure we covered the injectors and they were fine, but now i also need a battery, and he recommends using an 850, is that right?

user 797w349o

we just found a major problem last night, all spark plugs were leading, none trailing, because the dealership it came from gave us 4 spare Ls rather than 2 Ls and 2 Ts, so we switched back to the original Ts, now if we only had a more powerful battery wed be able to test without a jump, but it seemed to try harder to start, and did a few times, but again, stalled after, so we think it might be to do with the starter?

zeropistons0

I don't kno to much abot rx's yet seeing as I'm new to them but my 91 gxl had the ssme problem try checkin the egi fuse and leading coils idk if that'll help but thats what fixed mine good luck and hope you get her running

gracer7-rx7

iTrader: (16)

That shouldn't matter much. On the FD, we use heat range 9 plugs all around.

Sorry but I can't help beyond that.

Do check the 2nd gen FAQ thread for other ideas.

Seacoastrx7

im thinking its not getting fuel either the fuel tank sock is clogged or the inline fuel filter is clogged or water in the rails and injectors. so try this first put about 1 gal of fresh fuel in the tank then put 2 bottles of dry gas in the tank then rock the car for like 5 mins mixing the dry gas/try using the dry gas with injector cleaner after you are done rocking the car crank it up. this might not be the fix but ive had this happen on a few cars that sat for awhile and this always cleared it up. also have your friend crank it and at the same time take the handle of a screw driver and lightly tap on the injectors its hard for the injectors to pass water through them. and how old is the gas thats in the tank?
good luck man

chris

Otaku

iTrader: (1)

Ever tried manually holding down the gas after it starts @ around 2k rpmish (Til the engine is warm @ 180 F)? It could be the BAC valve. My car always instantly dies on idle but only when its cold. When my car is warm the idle stands firm at 750 every time.

user 797w349o

we did try holding the gas when it started, but the gas didnt do anything at all

as for the dry gas part, im sorry but i really dont know what that is, but my mechanic gave me some methyl fuel stuff thats supposed to keep your fuel fresh for when it sits, and he told me to fill the tank, then put that in it, maybe thats what you are talking about, but if not, then im unsure of what to do, we also removed and cleaned the starter, then tried jumping it again, and that helped a hell of a lot, the starter goes a lot easier now, and we checked the old gas and it did not smell good at all, and we tried changing the timing through the distribuotr cap, and that seemed to work a bit, but these are just some things we tried that i thought i should say, thanks for the info again guys

Seacoastrx7

ok having bad gas is not a good thing theres a drain plug on the bottom of the fuel tank id get all that old gas out well thats what i would do and if you end up doing that take a water glass drain some gas into the glass and look for little bubbles at the bottom should look like when you mix oil and water that would be a clear indication that you have water in the system. dry gas is a product that bonds with water and makes it combustible if you cant find dry gas then use iso-heat should be a yellow or organge bottle its sold at walmart pretty much all parts stores get the iso-heat with injector cleaner now before you do that change the fuel filter. my rx7 did this same exact thing when i ran it out of gas it would start up rev up to 3k then sputter out i thought something was messed up then i rock the car and i couldnt hear the gas swishing around.

good luck hope it starts up for ya

chris

user 797w349o

hmm, well just wondering, but whats the chemical called that makes dry gas? would methyl hydrate do anything?

Seacoastrx7

its basically alcohol

user 797w349o

ah, ok well thanks for the info, i'll look for some when i can get the money, but we'll try that as soon as we can

dkdsilver

lolol small world man so yeah im the guy thats been helpin him out with the GTU and i read what u all have said. I think th best thing for us to try is draining all the fuel and checking if the tank sock is cloged (plus replace the filter) put fresh fuel in and see if that works if not then we will try 12v to the pump to see if its just not getting the power it needs once i let go of the key i also have a question to add tho if your looking at the engine from the front theres the 2 fuel lines that go into the engine on the right when i took them both off and got him to crank it only one tube had fuel come out of it are they both suppose to get fuel or am i missing something here? thanks for the replys.

Seacoastrx7

should be 3 lines 1 feed 1 return and 1 to the vent can you should see fuel come out of the feed only so yes thats correct the return line returns fuel thats not used back to the tank. and yes draining the checking the sock and changing the filter sounds like a great plan.

good luck
chris

user 797w349o

we found the problem... the fuel pump is done.

vvvstaticvvv

i was reading this and this is what my rx7 is doing, i have a question on the fuel pump though, my fuel only comes out the line when i am turning the car over, should it be flowing when i first turn the key in "acc"?