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| 1986 Fiero SE Won't Run (Page 2/7) |
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72and86
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SEP 26, 07:35 PM
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| quote | Originally posted by buddycraigg:
What made you want to replace the fuel pump? |
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Same symptoms as my 1990 Ford Bronco, ran if you sprayed starting fluid in throttle body. I replaced it in Bronco and it ran and idled like a dream.
Fiero had same problems. Also my Fiero had NO low end power, nothing. Keep in mind I haven't taken the Fiero out of my driveway since purchase cause it runs so bad. Its been getting worse and worse.
Update: ICV replaced. No real change. It starts hard, then idles really high, and dies. TPS on order.
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Xenoblast
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SEP 26, 07:47 PM
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Did you ever see if it would run with the diagnostics ports shorted?
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buddycraigg
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SEP 26, 10:24 PM
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I'm sorry that I have forgotten a lot about these cars.
I still understand things, but my head works kinda different now.
So I'm wondering about fuel pressure or TPS.
The TPS can be tested with a multimeter.
You can test your fuel pressure with a fuel pressure gauge.
You can remove the IAC and use your finger to cover the hole and run the engine at idle/
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72and86
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SEP 27, 12:04 PM
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| quote | Originally posted by Xenoblast:
Did you ever see if it would run with the diagnostics ports shorted?
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I just tried this. Doing this, it wont even start at all. Just cranked. At least before it started and died. Now jumping the ports it doesn't even do that. Just cranks. tried 6X.
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72and86
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SEP 27, 12:09 PM
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| quote | Originally posted by buddycraigg:
I'm sorry that I have forgotten a lot about these cars.
I still understand things, but my head works kinda different now.
So I'm wondering about fuel pressure or TPS.
The TPS can be tested with a multimeter.
You can test your fuel pressure with a fuel pressure gauge.
You can remove the IAC and use your finger to cover the hole and run the engine at idle/ |
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IAC replaced. No change.
Have plenty of fuel pressure.
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Rexgirl
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SEP 27, 03:16 PM
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Maybe check for a crack in the EGR pipe (esp where it attaches under the plenum) ?
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ArthurPeale
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SEP 28, 03:21 PM
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| quote | Originally posted by 72and86:
I just tried this. Doing this, it wont even start at all. Just cranked. At least before it started and died. Now jumping the ports it doesn't even do that. Just cranks. tried 6X. |
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If it runs without being put into diag mode, but won't after being put INTO diag mode...I'd definitely check the timing.
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buddycraigg
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SEP 28, 07:29 PM
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| quote | Originally posted by 72and86:
IAC replaced. No change.
Have plenty of fuel pressure. |
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I know you replaced the IAC.
If you remove it, you can use your finger to control the air flow through the throttle body.
That is what I am suggesting you try.
If you do not have your finger on the hole, it should have a very high idle.[This message has been edited by buddycraigg (edited 09-28-2021).]
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72and86
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SEP 28, 07:42 PM
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| quote | Originally posted by ArthurPeale:
If it runs without being put into diag mode, but won't after being put INTO diag mode...I'd definitely check the timing. |
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How do I check it when the idle is all over the place as its nursed manually by someone by the throttle cable connections? And what would cause the idle problem out of nowhere when it idles before but roughly?
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72and86
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SEP 28, 07:44 PM
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| quote | Originally posted by buddycraigg:
I know you replaced the IAC.
If you remove it, you can use your finger to control the air flow through the throttle body.
That is what I am suggesting you try.
If you do not have your finger on the hole, it should have a very high idle.
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Ok. Will try that.  BTW heres the 2 ICXs.
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