1990 Ford Bronco II Pinging Noise

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ROCKMONKEY17
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  • 5 POSTS
Hi, i just bought my bronco( :D ) privatley. It's been sitting for about 2 months, just because the owner bought a more economic vehicle. And with 150,000 miles on it, im a little worried about the engine. As i said, it was sitting for about 2 months, however, on the test drive, it fired immediatley, and i let it warm up for about 4 minutes. Now, when i put it in gear, when i pushed passed about half way on the accelerator, i could a pinging noise( :? ), and i think its the lifters. It happened every gear, in that throttle range. Now im not that great with engines, but im not sure if its the throttle body, a broken engine mount and the engine is just shaking, if its the lifters, or it was still just too damn cold. I was planning on getting an engine rebuild kit anyway and doing it myself, but i just need to know if its something else( :evil: ). My friend said it was probably just cold after sitting... But, Any feedback would be GREATLY appreciated! Thanks! (2.9L V6 by the way, stock)
Jan 25, 2006 at 5:11 AM
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SC1 RACING
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  • 117 POSTS
i dont know what year it is but if it is an older model with a manuel fuel pump. they have been known to do that.
Jan 25, 2006 at 5:18 AM
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LOVESCARS
  • ✓Experienced Mechanic
  • 359 POSTS
If the oil hasn't been changed recently change it and put a bottle of Marvel Myster in with the motor oil see what happens???
Jan 25, 2006 at 5:22 AM
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ROCKMONKEY17
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Sorry, i should have included that in the body, its a 1990 bronco II, so i dont think its a manual fuel pump.

And i forgot he mentioned that... It is due for an oil change and a full fluid flush. Could it really be as simple as an oil change? BTW, what will the Marvel Myster do?

P.S. - Thanks for the fast responses!
Jan 25, 2006 at 5:26 AM
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LOVESCARS
  • ✓Experienced Mechanic
  • 359 POSTS
Yes it could be! I'm a firm believer to look at the obvious rather than jump to the expensive stuff right away. You should also try running a bottle of isopropyl dry gas to remove any foreign contents that may have accumulated in the old gas, with at least the recommened gallon amount in the tank. I owned a 90 ranger w/2.9 and it only liked super unleaded fuel.
If that doesn't do it I would likely recommend having the computer checked to be sure your timing is advancing with load
Jan 25, 2006 at 5:42 AM

Suggested Repair

Change the engine oil and add a bottle of Marvel Mystery Oil. Treat the old fuel with isopropyl dry gas, keep at least the recommended amount of fuel in the tank, and try super unleaded. If the pinging continues, have the computer checked to confirm timing advances under load.

Conversation Summary

The owner of a 1990 Ford Bronco II with a 2.9L V6 reported a pinging noise under moderate to heavy throttle after the vehicle sat for about two months. One expert suggested a manual fuel pump issue on older models, which the owner ruled out. Another expert recommended starting with an oil change and Marvel Mystery Oil, treating stale fuel with dry gas, and using super unleaded. If those steps do not resolve it, the computer should be checked to verify timing advance under load.

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