C4 Tech/Performance L98 Corvette and LT1 Corvette Technical Info, Internal Engine, External Engine

1986 Vert Running rough -- All fixed now

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Old Jan 25, 2014 | 04:35 PM
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Default 1986 Vert Running rough -- All fixed now

My car started running rough with a noticeable lack of power, mileage dropped to 12.5 MPG.

Decided to do a minor tuneup -- plugs and wires ... I found one wire burned and cracked and likely shorting to the manifold ... and the plugs all had that grim line on the porcelain. It's been a while so I changed them.

After the job was done I started it up and it did sound better but still a little rough. So I got some carb cleaner and gave the MAF a good cleaning. Started it up again and there was my nice motor back humming like a charm. Stoked that it only cost me a set of platinum plugs, wires and a little cleaner.

I was worried that the cats were clogged. Put that job off for when I put an exhaust system in.
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Old Jan 26, 2014 | 12:55 AM
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It's possible your MAF burnoff relay is bad and not doing the burnoff function correctly. Mine slowly ran worse over time when my relay was bad.
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Old Jan 26, 2014 | 09:38 AM
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Default Maf

Good to hear it's now working.

I thought you weren't supposed to use carb cleaner on a maf as it could screw something up. Don't know if you were lucky or my info was incorrect.
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Old Jan 26, 2014 | 03:45 PM
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Default Think it's OK --- I'll watch for the burnoff relay issue.

I've used starting fluid many times before into the MAF so I figured carb cleaner would be OK.

If my car starts to go downhill in performance and especially if it sets MAF codes I'll look at the burn-off relay.

Thanks for the advice
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