Backfiring and idle issues
3/4/07, 11:24 AM
#1
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Backfiring and idle issues
Once my car starts to warm up (just above cold) it backfires and idles/runs bad. The backfire is coming from under the hood, the intake I'm guessing? Once the temp gets to normal, the car runs fine. Any ideas?
The car runs great when cold and when running a normal tempt. It's just that period where the cars temp starts to rise.
Thanks in advace...............Mike
The car runs great when cold and when running a normal tempt. It's just that period where the cars temp starts to rise.
Thanks in advace...............Mike
3/4/07, 11:36 AM
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Little more info on the car..........
It's a 92 LX 5.0, 181,000 miles. It has new plugs and wires. The ONLY thing replaced under the hood was the alternator (just replaced), the thing lasted 180,000 miles..........dang!! The water pump was replaced also. Everything else is original, including the MAF and all other sensors.
Thanks again..........Mike
It's a 92 LX 5.0, 181,000 miles. It has new plugs and wires. The ONLY thing replaced under the hood was the alternator (just replaced), the thing lasted 180,000 miles..........dang!! The water pump was replaced also. Everything else is original, including the MAF and all other sensors.
Thanks again..........Mike
3/4/07, 01:29 PM
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two O2 sensors, I bought Bosch brand at a NAPA store and they were 40 bucks a piece, they might be a little cheaper at Advance Auto or Auto Zone, sometimes they run sales on 'em too
3/9/07, 05:13 PM
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Yeah, just got done doing that. Figured I'd try that b4 the O2 sensors.
I did notice the car runs pretty much the same with the MAF unplugged.
Sound like the MAF is shot?
Mike
3/13/07, 01:27 PM
#8
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Almost sounds like a leaky ignition coil. Has that ever been done? Sometime they rupture and arc out under load. At 180,000 you can't go wrong by replacing anyway.
3/13/07, 07:19 PM
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Never replaced the coil, so true on the ''can't go wrong by replacing''. I'm shocked it ran so good for so long with everything original in it. Once I get a little more money, I''l throw some parts at it. Think I'm gonna start with the O2 sensors than maybe the coil. Thanks for all the feedback guys.
Mike
Mike
3/13/07, 07:40 PM
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181,547 to be exact
More than likely I'll be changing them out this week end. Valentino, they just screw in? Looks like they come with some sort of greese, or is that like a thread lock?.................Thanks man
3/13/07, 07:50 PM
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yeah they are just threaded in, it will be a lot easier and quicker if you buy one of those special O2 sensor sockets from the parts store. the sensors come with anti-sieze on the threads
3/16/07, 04:15 PM
#13
OK, I had the same problem with my 87 Gt, I am the Original Owner and one day it started stumbling, it ran better when warm but finally was getting so bad it was ****ing me off!! replaced the standard tune up stuff, tps and finally after all that I replaced the FUEL INJECTORS. Now she runs like brand new with 185,000 miles. The injectors where so bad the were breaking appart when I took them out, they were junk, I can't imagine how bad they were flowing and not cooling the cylinder walls at all. The Mustang runs cooler and has the power back!!!
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