my 84 duke keeps catching fire.......any ideas why?

Tell us lots more, where is the fire coming from. Is it immediate upon start-up, any major oil leaks or leaves on the exhaust manifold or if inside the car leaves in the heater box??

Well. An engine catching fire is no joke, you have a big issue on your hands. But the 84's are infamous for catching fire. I believe it was oil on the CAT that would cause it? or it could be a fuel leak. Someone with more experience with the 84's fire issues will chime in soon. But please fix it before you think about trying to drive it

Are joking or totally serious?

Where abouts is it catching fire? On top of the engine? Wiring harnesses?

Also inspect the seals on your fuel filter and all related fittings, since it is located on top of the engine.

I would suggest checking the valve cover gasket, when it leaks it will drip puddles right between the exhaust manifold flanges.

The big fire issue that killed their images was when a rod would break and punch a hole in the block, spraying oil onto the cat.

This car runs fine otherwise?

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[This message has been edited by Xanth (edited 12-05-2007).]

its catching fire at the throttlebody.....but other than the fires its been a great car. and i have already replaced the injector twice and the fuel filter and the fuel pump. im getting ready to replace the fuel pressure regulator.

Okay, is it actually catching fire or backfiring out of the throttle body?

Is it shooting up out of the throttle body or is the general area catching fire?

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[This message has been edited by Xanth (edited 12-05-2007).]

the general area is catchin fire it will run for a few minutes then it catches fire.

Gonna be like pulling teeth

pics?

Sounds like he needs his TB rebuilt, new injector and wires fixed..... probabaly leaking all over and the injector wire is acring...

I was thinking very rich or dripping wet injector. Liquid fuel leaking past the closed valve. Jumping time one tooth or so would do this also.
Joe

i think the 84's are gear driven so you cant jump a tooth, well you can loose a tooth, but then most likley youll loose more than one tooth and it wont run at all,

or am i off base here

Yeah, the 84s are gear driven. Not sure if you could actually skip a tooth without destroying one of the gears, though I do believe you can install it incorrectly.

if i had an "84 that kept catching fire, I think I'd just get rid of it and get a later year car rather than putting Any $$$ into it at all. Those of us that have cars for sale can tell you that nice fieros aren't going for much ....

This is a most curious problem. The cold start injector is right below the throttle body I believe, perhaps you should check that out for leaks. If the problem continues you will need my services.

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My 86 caught on fire once with my wife driving. It was leaves on the exhaust that ignited when she came to a stop. The fire was in just the right spot that the only thing it burned was a hole in the radiator hose which blew water on the fire putting it out. What are the chances?

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I don't think 1984 Fieros with 4 cyl. engines don't have cold start injectors.

I had an engine fire last spring. It was caused by the tubing that runs from the fuel filter to the throttle body being loose. I had installed it without tightening the fittings and forgot to go back and tighten them. There is an O ring on the end of the tubing that goes to the TB. I can't remember if there is one on the other end for sure, but I think there was. If that O ring doesn't seal for what ever reason you can eventually get a fire from the leaking fuel. You might need to replace the tubing. I don't know if the O ring is replaceable. Another thing that could cause a fuel leak up there which could result in a fire is if someone replaced the injector and didn't get all of the screws tightened back up.

[This message has been edited by William Federle (edited 12-06-2007).]

I had a fire in my trike one time. I had been looking for something in the trunk and left a towel hanging half out of the trunk and into the engine compartment. I was getting on the freeway when I noticed the smoke in my mirrors. I pulled over on the on ramp, opened the deck lid and threw the towel out onto the shoulder. I was trying to put out the flames coming from my plug wires when I noticed the towel had started a brush fire. After stomping out the brush fire I carefully arranged the carbon filaments (the only thing left of my rear plug wires) so they weren't touching and slowly backed up the on ramp and headed for the nearest parts store for new wires.

He's yanking our chain I think, no way he's serious.

That's what I thought, too, based on his post and response.

In any case, to get ignition of the fuel in the intake the timing would have to be way off, or one or more intake valves leaking badly, or the spark plug wires crossed up somewhere.

JazzMan

[This message has been edited by JazzMan (edited 12-07-2007).]

nismokidd12 please contact me regaurding your non payment of the items that I have shipped to you. I did not realize that you sent an uncleared e-check. I have emailed you and sent you PM's with no return please take care of this situation. Lets clear this up please.

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quote Originally posted by 2.5: He's yanking our chain I think, no way he's serious.

Indeed. I drove a Chevy V-8 with a broken rod for 200 miles before I got enough of a backfire to cause a carb fire. If this guy has a broken rod or a HUGE timing problem the car wouldn't be "a great car" otherwise. He'd KNOW IT!

Put up A video on u-tube, could be pretty funny.

i second video.... for researching purposes..... lol