Diagnosing a problem with mkiii 7m-gte

guns

New Member
Apr 2, 2007
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Ok I want to buy a supra. Its a 1988 supra turboed. It has resently had the sparkplugs and wires changed. It had an manifold exhaust leak and was taken in and fixed the guy got it back and it started running really rough. Sounds like a cylinder is missing. Does it sound like it just needs the spark plugs changed again or is it possible that something more is wrong with it? I know supras can be finicky.

My old toyota pickup had something like this happen to it where it just started running roughly and missing so and all i needed to do was change all the spark plugs. Sense this happened after a fixing exhaust manifold just questioning if plugs or maybe something else might be the problem.
 
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Nick M

Black Rifles Matter
Sep 9, 2005
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Bad plugs can certainly make it run rough. But you are the only one that has seen how bad it is. Does it start hard? Does it smoke when starting? Is the exhaust leak fixed? You should be able to tell by the noise. A leaking exhaust manifold will make your mixture richer, and after time, foul the plugs enough to cause it to run bad.