Thread: Odd Issue: Plugs read lean car using excessive fuel.

I have been chasing an odd timing issue on my P10 race car and have a new symptom...

during a 20 lap (5 mile) feature even i used 5 gallons of gas, yes that is 1mpg...I can usually run 2 weekends of practice, heat races and the feature on 5 gallons.

so I do my post race plug check...the plugs read a lean condition...my timing is set at 15*'s but I have to retard my distributor nearly all the way to get it there, power is good, not great and I get an off throttle bucking from time to time...

anyone with thoughts? possible MAF? timing related?

I'd be checking for leaks....lol

what crank pulley do you have? if its a stock type maybe it slipped an your getting a false timing reading..

OR your distributors bad, i had that issue once, had to have it at full retard for 15* base timing.. changed the dist an its been fine since.

IIRC super retarded timing will eat up the gas and also kill the power.

wow im in the same boat,my dizzy is not fully retarded but I try too put it in timing mode but when i disconnect the tps it stays at 1500 rpm i turn the idle knob all the way down and nothing ..plug tps back in and it idles perfect..sorry for going off topic..:o