Cannot locate problem with engine missing
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Joined: Aug 2005
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Cannot locate problem with engine missing
Hi,
I have a 1992 F-150 with 5.0. 135,000 miles. The issues is that there is a slight miss. During moderate of heavy accelaration it is not noticed. During idleing, it may miss about three times a minute. It is very noticable while coasting down the road from 20 to 40 MPH with just enough acceration to maintain speed. Then it seems to miss about 15 to 20 time a minute. You can barley feel it, but I feel like a bobble-head going down the road. So far the following has been done at auto shops:
New plugs, wires, coil, roter and cap, fuel filter.
Diagnostics: All the following was with-in specs. Fuel pump pressure has been tested, pressure regulator, pressure at the fuel injectors, fuel injector voltage reading. The shop stated that they checked all connections.
They even attached a tach and drove it and said they could see it drop. Spent $175 for a complete chemical cleaning off the fuel system and valves.
One person stated that this is a classic sympton for a serverly streched timing chain. The shop tested for that and stated that they there was no noticable play in the timing chain.
Any help would be appreciated
I have a 1992 F-150 with 5.0. 135,000 miles. The issues is that there is a slight miss. During moderate of heavy accelaration it is not noticed. During idleing, it may miss about three times a minute. It is very noticable while coasting down the road from 20 to 40 MPH with just enough acceration to maintain speed. Then it seems to miss about 15 to 20 time a minute. You can barley feel it, but I feel like a bobble-head going down the road. So far the following has been done at auto shops:
New plugs, wires, coil, roter and cap, fuel filter.
Diagnostics: All the following was with-in specs. Fuel pump pressure has been tested, pressure regulator, pressure at the fuel injectors, fuel injector voltage reading. The shop stated that they checked all connections.
They even attached a tach and drove it and said they could see it drop. Spent $175 for a complete chemical cleaning off the fuel system and valves.
One person stated that this is a classic sympton for a serverly streched timing chain. The shop tested for that and stated that they there was no noticable play in the timing chain.
Any help would be appreciated
Last edited by IB Tim; Aug 31, 2005 at 11:38 AM.
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Enjoy FTE....and
JOIN CLUB FTE -SUPPORT THE FORUMS!
…..See you on the boards.