Car doesn't stay running

105

Asked by Mar 29, 2015 at 11:30 AM about the 1984 Pontiac Fiero SE or Indy

Question type: Maintenance & Repair

I have a 4-cyl pontiac fiero se. It's been
sitting for about 7 years. when I first started
to work on it, it wouldn't run. I took the carb
apart, cleaned all the parts, soaked the
injector, and put it all back together. When I
was putting the injector back in, the small
o-ring on the bottom got a little damaged. I
didn't think it was a big deal, so I left it and
tried to start it and after a few cranks it fired
on its own. Sadly it doesn't want to stay
running. When I step on the throttle it bogs
down and sounds like it's not getting
enough gas. I changed the fuel filter and
the oil, but it has the gas in it from 7 years
ago. Could it be a bad fuel pump? Particles
in the fuel that are getting stuck in the
injector? The damaged O-ring? Carb
gaskets? What should I do? Also I'm trying
to do this on a low budget. THANKS!

14 Answers

545

I would get that bad gas out of there the gas today is garbage if it stands over a few months. I would change the O ring you can buy single O rings or by a kit with an assortment cheaply. Next you have to find and clean the IAC valve this is what controls the cars idle, this IAC is controlled by the computer, be careful cleaning it it's very the tip of it fits into a beveled hole this moves back and forth to control the idel.

1 out of 1 people think this is helpful.
105

Thank you, I was thinking that too. what's the easiest way to get the gas out of the fiero. Siphoning or take the whole tank off?

2 out of 2 people think this is helpful.
105

I cleaned the iac valve and it's still not running right. I think it's the gas and the o-rings and gaskets... am I right?

545

I would say you are on the right track this new gas is almost worthless when it's fresh, after standing for years it's total junk. We used to call it flat gas back in the day but that stuff at least burned in an engine this stuff is like water when it's gets old. I hate to leave any of it in my new corvette without adding a stabilizer

Best Answer
105

Yeah I bet, thanks for the help!

545

You mentioned a carb, and then described working on an injector. How could the car have both? I thought those cars were fuel injected. Old gas is useless, and will not run a car properly. With the car having sat for 7 years and being an older car, I would really check out the brakes system, including the changing the brake fluid, and inspection of all associated rubber parts. For your safely and the safety of others, Please make Sure this Car Will STOP itself before driving. Best of luck.

1 out of 1 people think this is helpful.
105

yeah, I didn't mean carb, I meant the trotted body

1 out of 1 people think this is helpful.
545

There is also likely a fuel injector driver pin.

1 out of 1 people think this is helpful.
545

A car I had kept dying, and the fuel injector driver was bad.

1 out of 1 people think this is helpful.
545

I think you will find the clean new gas will make a world of difference then and only then should you consider the fuel injector.

105

I've already cleaned the fuel injector so I think the new gas will do it, just runs hard with the old gas

1 out of 1 people think this is helpful.
143,075

Those guys are right, surprised it runs at all on that old gas

105

Haha, she barely runs

40

it is a throttlebody injector is it not? 4 cylinder? That thing looks like a carb but has a single injector that basically sprays down into the carb.. is that what you have there?

1 out of 1 people think this is helpful.

Your Answer

Add photo

Related Questions

  • fuel isnt coming out of the carburator and the car wont stay running. 9 answers

    So my fiero has been sitting for 7 years and i recently wanted a project, so i got it out and started working on it. The car cranks but it wont fire up. I had someone turn the key while i poured a l...

    1984 Pontiac Fiero Base

    -

    Maintenance & Repair

  • Car doesnt want to stay running 7 answers

    I have an 84 Pontiac Fiero 2.5L 4cyl engine. Ive cleaned the TBI system along with a rebuild kit, got a new Fuel Pressure Regulator, soaked the injector, and put fresh gas in it. its sat for a few y...

    1984 Pontiac Fiero SE or Indy

    -

    Maintenance & Repair

  • will not stay running 3 answers

    car starts, run's 3 or 4 seconds then quits and it restarts runs 3 or 4 seconds

    1986 Pontiac Fiero GT

    -

    Maintenance & Repair

  • 86 the car start up and then stop runing and will run / if i spray gas into it it run 1 answer

    1986 gt the car will not stay runing it start up and stop running /if i spray gas into it it will run/ i replaced the fuel pump/ fuel pressure reg.

    1986 Pontiac Fiero GT

    -

    Maintenance & Repair

  • Doesn't stay running.... 4 answers

    I've replaced the spark plugs, battery, alternator... Not holding the charge. It runs but dies after a few minutes. This started after I replaced the spark plugs

    1999 Pontiac Sunfire 4 Dr SE Sedan

    -

    Maintenance & Repair

Fiero

Looking for a Used Fiero in your area?

CarGurus has 61 nationwide Fiero listings and the tools to find you a great deal.

ZIP:

Search Pontiac Fiero Questions

Pontiac Fiero Experts

#1 Steve Neyens
Steve Neyens
Reputation 210
#2 THORNY68
THORNY68
Reputation 200
#2 dandyoun
dandyoun
Reputation 200
View All

Related Models For Sale

Used Chevrolet Camaro
621 Great Deals out of 38,657 listings starting at $2,995
Used Chevrolet Corvette
339 Great Deals out of 19,713 listings starting at $3,688
Used Pontiac Firebird
10 Great Deals out of 732 listings starting at $3,800
Used Ford Mustang
640 Great Deals out of 36,930 listings starting at $2,800
Used Toyota MR2
16 listings
Used Dodge Charger
496 Great Deals out of 27,801 listings starting at $2,343
Used Ford Thunderbird
30 Great Deals out of 1,052 listings starting at $7,250
Used Pontiac Grand Prix
14 Great Deals out of 3,212 listings starting at $1,995
Used Nissan 300ZX
129 listings

Used Cars For Sale