92 tbird won't start

Tiny
EDMSWIZ1
  • MEMBER
  • 1992 ALL OTHER MAKES ALL OTHER MODELS
My son has a 92 tbird LX with 5.0 engine (140K miles). It was running then starting to lose power. When he pulled it over to the side of the road it would not restart.
After towing it home I have done the following:
Checked the engine error codes (I only get 114 & 116)
Replaced the fuel filter, checked the fuel pressure (40 psi)
Cranked the engine with a plug out to check for spark (had a good blue spark)
Replaced the spark plugs and replaced the battery
Checked the injectors to ensure they were getting voltage (I get 12V on the red wire and the white whire voltage varies like it is getting a signal when cranking)
Checked the trottle position sensor and it had a varying resistance based on throttle position

When I crank on it it will crank at first then loses steam quickly. I am concerned the timing chain has slipped. Is there a good way to test for this without removing the cover? Also any other ideas or areas to check would be appreciated.
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Saturday, January 14th, 2006 AT 1:03 PM

5 Replies

Tiny
DB554
  • MEMBER
Have you ever changed a head gasket?Was it smoking before it cut off? I have owned a few of these cars and they are known for this to happen it is called a 75,000 mile tune up.
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Sunday, January 15th, 2006 AT 4:44 PM
Tiny
EDMSWIZ1
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It was not smoking and it doesn't have the symptoms of a head gasket. None of the cyclinders act like they are firing when cranked.
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Monday, January 16th, 2006 AT 8:58 AM
Tiny
JTGT350
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Here's a longshot, but I'll throw it out anyway. '89-'92 T-Birds & Mustangs had some issues with bad fuel sending units (located in the tank on the fuel pump assy.) Many people were having the same symptoms you are describing (loss of power, sputtering, car died, unable to restart). What was commonly overlooked was whether or not there was actually gas in the tank! Many techs took (and still take it) that the fuel gauge is correct). I've had a number of late model ('00-'02) Stangs brought to me with the same problem, only to find out they ran out of gas, even though the gauge showed they had fuel in the tank.

Hope it's as simple as that.
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Thursday, January 19th, 2006 AT 12:40 AM
Tiny
LOVESCARS
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In answer to your question regarding the timing. To check this make sure your number one cylinder is at top dead center and at the correct timing degree this can rule that out
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Thursday, January 19th, 2006 AT 4:18 AM
Tiny
BABYBLUE_33
  • MEMBER
What about map sensor or the fuel pump itself if it not out of gas?
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Thursday, January 19th, 2006 AT 3:20 PM

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