Re: Stopping pinging in 98 Marquis

1998 Mercury Grand Marquis

> > Engine pings on hot days with air on, going up hills in low gear - as I > understand it, a somewhat common problem. > > I have cleaned the MAF per the instructions at >
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It helped somewhat, but> pinging still bad on highway (around 70-80 mph) with air on.> > Currrently running 93 octane which almost completely removes pinging, > even in situations that really tax the engine. > > If anyone could answer the following questions or point me in the > direction of a good FAQ, I'd greatly appreciate it. BTW, I'm on a tight > budget. > > I've read that the other cause of pinging is carbon buildup in the > engine. Is this correct? What are the possible solutions? Is there an > additive to the fuel that can correct this, or at least help it? If a > mechanic is needed, what is it exactly that needs to be done? > > Thanks! > -- Joel >

I have heard the same thing about carbon build up. Might run some Sea Foam through it to clean out the carbon. I find it at the auto parts stores for less that $6.00 a can. A lot of us motorcycle riders use it with good results. Just a can put it in the tank and use the octane the car calls for.It might take a couple of cans/tanks to clear it out. Or it could be a knock sensor, if the car has one which adjusts the timing when it senses the pre detonation. Another good one recommended by a Volkswagen mechanic it a product made by Chevron called Techroline (sp?). It might be easier to find. Good luck!

Reply to
el lobo
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That's it! Dang, that's what happens when you become kinda senior like ;)

Reply to
el lobo

Reply to
Stan Kasperski

Hey, not that this'll help.....but who knows

I have an 83 grandmarquis, 302, efi. And sometimes it gets crap stuck in the EGR valve, too...ever once in a while we just take it off and blow it out with the old air compresser.

Nic

Reply to
Robotnik

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