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Guest Message by DevFuse
 

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84 EA81 rough idle questions.


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8 replies to this topic

#1 mfa_mad_pig

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Posted 06 July 2014 - 01:45 AM

So I've got an 84 EA81 wagon and it idles really rough. I recently did a weber conversion and changed the head gaskets and and there are no vacuum leaks, it still idles rough. What could be causing this?

#2 mfa_mad_pig

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Posted 14 July 2014 - 05:59 PM

Triple checked and can't find any vacuum leaks. Also has a new PVC valve. Idles rough above 900 rpms and won't idle at all below that. Anyone have any ideas?

#3 Dee2

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Posted 15 July 2014 - 12:47 AM

time for a tune up ?



#4 mfa_mad_pig

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Posted 15 July 2014 - 05:17 PM

Forgot to say already have new plugs, wires, cap and rotor, and fuel filters. The tach jumps up and down at idle also.

#5 Hsoj

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Posted 15 July 2014 - 10:04 PM

Did you check the float? They get bounced around in shipping quite a bit and can get damaged. Truthfully, I've only installed two, but both were off.



#6 naru

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Posted 15 July 2014 - 10:18 PM

Forgot to say already have new plugs, wires, cap and rotor, and fuel filters. The tach jumps up and down at idle also.

 

 

In that case,remove the cap and see how much sideplay the distributor shaft has.

Should be very little.



#7 mfa_mad_pig

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Posted 16 July 2014 - 07:54 PM

I rebuilt the weber so I think the float is probably good. Checked the distributor and there definitely is some play when I wiggle the rotor. Not sure how much is too much though...

#8 naru

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Posted 17 July 2014 - 09:59 AM

Anything more than barely perceptible is too much.

The reluctor air gap is only .020" maximum.

The jumping tach is a dead give away that you need new distributor bushings or a new disty.



#9 mfa_mad_pig

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Posted 17 July 2014 - 06:28 PM

The tach only fluctuates a couple hundred rpms so I think a rebushing should do it.




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