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1994 Trans Sport 3.8 missfiring
O.K. I have new info on my problem. I decided to power brake it when
i got home tonight. I just slowly increased the R.P.M.s Sure enough right at 1600 it started to miss, then went away at 1800. No miss above or below that range. It sounds like it is just one cylinder, not multipull misses. Whats up with that? A missfire in a mid R.P.M. ?? Maby at that voltage range one injector is weak. Any more thoughts would be helpfull. Thanks, TP |
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1994 Trans Sport 3.8 missfiring
"tp" > wrote in message ups.com... > O.K. I have new info on my problem. I decided to power brake it when > i got home tonight. I just slowly increased the R.P.M.s Sure enough > right at 1600 it started to miss, then went away at 1800. No miss above > or below that range. It sounds like it is just one cylinder, not > multipull misses. Whats up with that? A missfire in a mid R.P.M. ?? > Maby at that voltage range one injector is weak. Any more thoughts > would be helpfull. Thanks, TP > Secondary voltage demand goes up as you put a load on the engine. If there is any weakness in the secondary insulation (plug wires, coil molding, spark plug insulator etc) then it may only arc when the voltage reaches a high level. Secondary voltage will drop off near wide open throttle and arcing may discontinue. This is just one possibility. TPS is a good guess also. The TPS is easy to check with a volt meter, but the secondary KV requires a bit more sophisticated equipment to monitor. If you are going to change parts on a guess, I would try a set of wires before a TPS. -- Kevin Mouton Automotive Technology Instructor "If women don't find you handsome, they should at least find you handy" Red Green |
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