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| Engineering/ Technical Ask technical questions about cars. Do you know how a car engine works? |
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#1
06-01-2003, 08:37 PM
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Ok, who knows cars? help me out here
Ok figure this one out... I brought my eagle in for a tranny job. The engine was dropped, the new tranny was put on, it was whipped all back together...the mechanic goes to start it...and the engines missing...running like a lawnmower... I got him parts off my parts car....MAP sensor, computer. He says there some sorta vacuum problem. So its running like crap, then he plugs this hole where its sucking air, and she purrs like a kitten, yet when plugged it has no power when the accelerator is pushed. What else can it be...it ran fine before the tranny job. It has new wires, plugs... any ideas!?!
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#3
06-03-2003, 01:29 AM
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What year is this car?
It might have a vaccum modulator on the transmission. That line could have been disconnected and is pulling excess air into the engine causing a lean condition, your O2 sensor sees this and the computer sends a rich command, viscious cycle, your car runs like shit. If this guy was trying to fix this by asking you for parts like a MAP and the computer(!) he probably has no clue about engines and especially doesn't know his ass from a hole in the ground when it comes to electronic engine controls, go to someone else.
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#4
06-03-2003, 03:10 PM
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The car is an '88...the mechanic that put the tranny in doesnt have the hookup for the diagnostic for the eagle premier...so the car is at chrysler now... will they be able to find the vacuum problem through the diagnostic at chrysler? also, if it is the vacuum that leads to the tranny, is it a big procedure to fix it?
Thanks
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#5
06-03-2003, 07:24 PM
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I'm not sure if your transmission has a vaccum modulator or not, thats the only vaccum operated piece I know of on an automatic transmission, that doesn't mean yours couldn't have a vaccum line going to something else on your tranny.
If it does, or if it's vaccum modulated, it isn't a big procedure to fix it.
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#7
06-04-2003, 05:37 PM
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UPDATE!
Ok here's the news...this is what Chrysler says (tell me if tihs makes sense, cause I have no clue) they say that the flywheel is bent, (probably happened during installation of the tranny) the bent flywheel is preventing a signal from being transferred to the crank sensor. This is what is causing the rough running engine. A new flywheel will fix the problem, according to chrysler.
Not exactly the news I was hoping for, but I have a flywheel from my parts car. Let me know if this makes sense anyway..thanks
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