Not sure if this has been brought up but i have a '86 iroc and it has a 305 TPI. well to get the car started it takes starting fluid to do it. if you dont use it, the car will crank but it wont start. with the started fluid it will start up but u have to give it gas until the car warms up (check engine light comes on) and then you can drive it fine. when you turn it off.... better bring that fluid.... What could be causing this? thanks

 

Check the error code first. My bet is it's for the TPS. If you can, check the TPS voltage and see if it is within spec.

 

Might want to check your cold start injector (9th injector).
Sounds to me like its not doing its thing.. which is to add extra
fuel during cold starts.

 

The engine wont start even after its been driven for a while. you shut it off and it wont start with out starter fluid... ill check the TPS also. and ill investigate the 9th injector. thanks

 

If i remember properly, the fuel pump circuit is wired through two different relays on your car. Power is supplied through the fuel pump relay itself, and is also wired through a relay connected to the oil pressure circuit... this allows the pump to run when oil pressure is present (when engine running), even after the fuel pump relay has failed. Id start by checking the relays, and the wiring for issues.

 

I also have a 1986 IROC-Z with a 305 TPI engine at home with the same problem.
Question what is "TPS"?

 

TPS= Throttle Position Sensor

You mention you are getting a SES light? Thats a good starting point for troubleshooting. Post the trouble codes and we can better help you.

 

So your IROC will only start using the fluid but it will run fine afterward....
I thought i was the only one. When you start it do you have to hold it at about 2K RPMS to keep it going until the check engine light comes on?

 

Sounds like maybe a MAF problem, Try disconnecting the MAF and see if it starts any better

 

GOOD NEWS!!! I found what is causing my IROC not to start... the engine light is still on but my car has a nice set of rigging on it but im not sure if its factory but i have a sensor looking part that is mounted over the battery and i opened it and there was a fuse in it (one of then green 30's) it was blown... I replaced it and it starts now. So it could be somthing to look for... GOOD LUCK!!!!

NOTE: IROC-Z is a 1987 (given wrong title)

 

I have the same issue with an 82 Berlinetta but it has a 305 and an electronic system. Runs fine after the fluid, but I can still sort of start it without the quick start, but as soon as you give 'er gas, she stalls. Were you able to acheive anything like this before I mess around with wiring? (Also has 3 year old gas, siphon out today).

 

Before i found that fuse.... i couldn't start it with out the fluid... mabye you should try to get some new gas in it to see what it will do.... i hope that the gas is your problem... but mine was a fuse but it needs a tune up but so far its doing alot better... first try the gas... then check relays (thats what happened to my old sport coupe... didn't fun that good.... gas relay was bad.) GOOD LUCK!

 

I drained the old gas via the pipe that goes to the fuel pump, and I got pretty well all of it out. Not a whole lot left in there, thank god. Then I started her up with a little bit of the left over old gas and she fired without the starter fluid. I got her to idle for almost a minute before she died out on me, (end of the gas). I'm gonna dump in some new gas pretty quick and get her running off of that. Hopefully the idle with old gas will signify that the new gas will do well. She needs a tune up for sure, but this saves me from switching intake manifolds and carburetors! Hoorah!

Thanks for the insight on the relays. Isn't that just TPI specific?

 

Im not 100% sure but i think if its TBI it might have some relays... (i think u said ur camaro was TBI but if not then i just wasn't thinking) but i was just tryin to get some ideas out there so that you wouldn't spend any cash that wasn't needed....

The wire that runs over the battery (bottom left) is where that fuse was.... like i said the car has some rigging but it starts every time now!!!

 

wow mcgyver love those zip ties dont ya

 

When I pull the codes from my 1986 Iroc-z TPI engine all it will give me is 12. Also, I found the fuse that was giving 19CAMARO85 problems. I was not able to work on the car last night, I well try to work on it to day.

If you have any other ideas on what could be causing this please let me know.

 

HAHA funny lol.... Yea the whole car is like that. I am starting to change it back to stock. Thats why i warned ya about the rigging... lol.


Thats cool... as of now i havn't thought of anything. I didn't mean to find that fuse but i got lucky... if i find anything else ill let ya kno. Let me kno how it goes today.

Signed,
-McGyver

 

Is this fuse pressent on the -89 5,7tpi?
I also gott this "starting fluid" blues...
Previous owner on my car has moved "things" around in the battery area...
but mine feels like it loost a cuple of horses do.
I got no SES light faulty codes (only the 12 code)
//Lars

 

Well, im not sure if the 5.7 TPI has the fuse but i would look. If you look in the pic that i posted. there is a little sensor looking piece that is mounted over my battery. im not sure if i goes there but thats where it is. The fuse im guessing runs part of the ignition system.... but also i have done a tune up and the car runs better but i still have the SES light on so im not sure. IF i need to just tell me and i can go and try to find about where that fuse comes out of in relation to the engine. Mabye this will help you. Good Luck

-Matt

Note (again): The car isn't a '86 or '87 Iroc its an '86 Z28 (LOTS OF PAPER WORK CONFUSION!!!)

 

If you are speaking of the black container holding the fuse with the orange wire running to it that is the fuel pump fuse. It should be mounted on the fender next to the battery. To my knowledge, when that fuse is removed or blown the pump will not operate. This may be a redundant fuse though if you said your car ran with it blown.

 

I take that as a "yes it's suposed to be there on a -89 as well"
And there are lots of electrical "parts" mounted on the right fender next to the battery (mostley aftermarket by prev. owner)

Thanks, I think i will find it... but if i don't i let you know.
I can hear the fuelpump working an can also mesure pressure.
did you here your pump when that fuse was gone?

...I am beginning to belive that my problem is with the injectors
I got 6 verry verry white sparkpluggs and 2 tan but i will check that fuse first of all
//Lars

 

When my fuse was out i could still hear the pump and once the car started it would run fine but after that fuse was changed it started on its own. After i put a tune up in (just plugs and wires w/ dist. cap and rotor) it ran smoother but i think the fuse is what caused my problem. If you need me to ill follow the wire and help you find it. thanks -Matt