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Old 11-16-2009, 11:21 AM
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Mysterious misfire

Hey guys got a bit of an issue here and would appreciate any info. I seem to have a misfire occouring with my car under acceleration/load. It has a new dist. cap, wires, plugs and a new ignition module. I have ensured all wires and connections are tight. I am at a lost of what could be causing a misfire like this to take place ONLY under acceleration and going up hill, it is worst at higher rpms as well. Could you please maybe list some causes for a misfire in the conditions I am having it in? What else should I check right off the bat that would be a common reason for this to happen?

Thanks for all your help,
Keith

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Old 11-16-2009, 12:40 PM
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Could be your fuel pump is ready to take a break..
Test it !!!
T.
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Old 11-16-2009, 03:23 PM
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Hi,
I think you should change the fuel filter.
Rich
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Old 11-16-2009, 06:31 PM
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Rich & T
dunno about the fuel pump and filter

I'm having the same issues with my old Dodge
manual trans / 225
runs just great in 1st, 2nd, 3rd

in 4th (OD) misses badly-----just replaced the fuel pump yesterday, have a new filter on the seat to put in when I get back home (truck has pretty much lived at the airport for the last 4 months).

I also have new wires, plugs, cap, rotor.
I'm leaning to the Electronic Spark Control now------the "Lean Burn" computer on my old Cordoba (400 Lean Burn) just drove me nuts-----now my ol stodgy dodgy is doing the same thing.
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Old 11-16-2009, 07:04 PM
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Quote:
Originally Posted by Bryan59EC
Rich & T
dunno about the fuel pump and filter

I'm having the same issues with my old Dodge
manual trans / 225
runs just great in 1st, 2nd, 3rd

in 4th (OD) misses badly-----just replaced the fuel pump yesterday, have a new filter on the seat to put in when I get back home (truck has pretty much lived at the airport for the last 4 months).

I also have new wires, plugs, cap, rotor.
I'm leaning to the Electronic Spark Control now------the "Lean Burn" computer on my old Cordoba (400 Lean Burn) just drove me nuts-----now my ol stodgy dodgy is doing the same thing.
Since both are doing the same thing, I would suspect bad gas. Try a bottle of Heet or another gas additive. It's a cheap suggestion to rule out water in the tank.
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Old 11-17-2009, 12:01 AM
richard stewart 3rd's Avatar
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Hi Brian,
I don't think yours is a fuel problem, sounds as if a knoc sensor or some other function of the spark control system may be retarding your timing.
Rich
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Old 11-17-2009, 08:03 PM
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Quote:
Originally Posted by S10 Racer
Since both are doing the same thing, I would suspect bad gas. Try a bottle of Heet or another gas additive. It's a cheap suggestion to rule out water in the tank.
Not bad gas----gets filled up every 150-200 miles.
Truck may be living at the airport most of the time-----but I do come home occaisionally

The Cordoba has been gone since the early 90s


(sorry for the hijacking, Keith )
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