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| Fiero V6 engine running rough. (Page 1/2) |
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LiftHatch
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FEB 03, 07:47 PM
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1986 Fiero V6 GT. As I start the car, the engine cranks, the engine runs rough, and the rpm is bouncing. This problem occurs even when you accelerate. The car feels like it is lacking power and you get this unpleasant jittery feel under acceleration.
I followed the instructions in the chiltons and haynes manual and it sugguested me to check the PCV valve and air filter. I checked the PCV valve and the hose to make sure they are operating and they are operating like they should. I also inspected the air filter and it's clean. What else could cause this concern? Here's a video of the RPM gauge that I recorded if it helps.
https://www.youtube.com/wat...X2U&feature=youtu.be
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Gall757
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FEB 03, 08:19 PM
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Do you have original ignition parts?
Does the car sit a lot, or is it a Daily Driver?
How many miles on it?
Is the condition worse in wet weather?
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LiftHatch
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FEB 03, 09:37 PM
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| quote | Originally posted by Gall757:
Do you have original ignition parts?
Does the car sit a lot, or is it a Daily Driver?
How many miles on it?
Is the condition worse in wet weather? |
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It currently has 65k miles so most likely it has the original ignition parts. It gets driven occasionally. The condition seems to be the same rain or shine.
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zzzhuh
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FEB 03, 09:46 PM
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Have you done the basic tune up of plugs, wires,ect.?
I'd start their and see if it changes. It might seem basic but it can be a night to day difference when an engine is only firing off of 5 cylinders.
It could also be the ECM but I wouldn't go into that just yet. A 65K Fiero should be running smooth.
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Csjag
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FEB 03, 10:02 PM
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I agree do the basics. Is your gas in the car fresh? Also look at the engine running on a dark night and see if you see any ignition arcing'
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Patrick
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FEB 03, 10:43 PM
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You're not running on three cylinders, are you? Make sure both injector fuses are good.
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LiftHatch
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FEB 04, 12:25 AM
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| quote | Originally posted by Patrick:
You're not running on three cylinders, are you? Make sure both injector fuses are good. |
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Just checked for ignition arcing and the injector fuses. There are no issues with either of them.
I circled the fuses that I checked, are these the correct ones?
I will check the other components tommorow! Thanks for the help everyone!
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Patrick
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FEB 04, 01:54 AM
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| quote | Originally posted by LiftHatch:
I circled the fuses that I checked, are these the correct ones?
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Yes, that's correct.
I figured I should mention the injector fuses just in case. I've read here more than once over the years about a 2.8 not quite running right... and it was one of the two injector fuses which had failed.
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therepairguy
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FEB 05, 09:19 AM
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EGR stuck open slightly??? at idle EGR should be off, if there is ANY leaking of exhaust into intake system at idle, engine will run horribly, only time EGR is opened is at cruise/steady RPM's, I believe above 35 mph give or take.
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Gall757
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FEB 07, 12:40 PM
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