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Re: MGA backfireing

To: RJohn50603@aol.com
Subject: Re: MGA backfireing
From: "DWADE REINSCH" <dreinsch@tenet.edu>
Date: Wed, 28 Oct 1998 08:19:23 -0600
A air leak into the exhaust manifold or headers will cause the little 
bit of gas/air mixture in the tail pipe to explode.



RJohn50603@aol.com wrote:
> 
> George,
> 
> Did the distributor get loose? Check the timing. If off, reset the timing. Are
> the points in good shape and set right? Are there any loose ignition primary
> (or secondary) wires? If so, correct as necessary. If not, proceed with next
> paragraph.
> 
> Did the idle get faster recently? Look for other air leaks including checking
> the vacuum advance diaphragm.
> 
> Plugs are cheap, install a new set. Pull one wire off at a time. Do they all
> seem to make about the same difference when they're off? Did you get knocked
> on your butt while doing this? If so, you might need a new plug wire set. If
> no change, go to next paragraph.
> 
> Check head bolts for correct torque. Re-set the valves (hot) paying special
> attention to the intakes. Did one get tight? OK now? If not, proceed with next
> paragraph.
> 
> Watch the rocker arm action at an idle with the valve cover off. Are they all
> traveling about the same? If not, a new cam shaft and lifters might be in
> order.
> 
> Do a compression check. What are the readings? A valve job might be in order.
> 
> Do you have or a have friend have a Color tune? I find this gadget very
> helpful. You could check the mixture. Don't get into adjusting the mixture
> without one.
> 
> Stay on the list with your results.
> 
> R. Johnson - Dallas

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