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Car shaking and hard morning starts

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Old Mar 10, 2012 | 04:49 PM
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Daniel Crider
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96 C220
Car shaking and hard morning starts
wen i start my car in the morning i must hold my foot on the pedal for a few secs or the car wil cut off. It causes my car to shake horribly i recently replaced the MAF sensor if that helps any. I feel as tho my car isnt idled up enough that wen ever a load is put it it such as a.c lights or heat its causes my car to shake and idle down. i can put my foot on the break and idle it up to abt 750 rpms and it stops the shakes. CAN SOMEBODY PLZ HELP 96 C220 SN wen i had a inspection the readout said i was idling at 640
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Old Mar 12, 2012 | 12:04 PM
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Eulogio Salazar's Avatar
Eulogio Salazar
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Tried checking the coils/spark plugs/ sparkplug wires?
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Old Mar 16, 2012 | 11:42 PM
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Daniel Crider
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96 C220
No but spark plugs are new think i shud try coils or wires first
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Old Apr 8, 2012 | 11:32 PM
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w202 1996 c220
Ever find out what the problem was? i have the same issue i also replaced the throttle body
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Old Apr 12, 2012 | 03:34 PM
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Russell Ormerod
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not a merc
most likely TB, also those car suffer from wiring harness issues
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Old Apr 12, 2012 | 04:19 PM
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w202 1996 c220
Originally Posted by Russell Ormerod
most likely TB, also those car suffer from wiring harness issues
Yea I took the car in to get the thottle body programmed with the computer but they found an issue with a power supply? Like a break in the circuit so he was in able to reprogram it :/ does it effect gas mileage cause it seems to run great once the idle is above 700 rpm
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Old Apr 18, 2012 | 10:08 AM
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Russell Ormerod
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not a merc
yes, throttle body will affect fueling
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Old May 23, 2012 | 04:36 AM
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96 C220
well never fully fixed the prob. my MAF sensor harness was shot to hell so replaced that and it def helpd the shakes. also ran some seafoam thru her and cleaned my trhrottle body. It made a big diff. i could tell jus from taking off from a stop. def always thought i bought a granny mobile til i put da work in, now my bit*h wil get down da road if i need her to lol. more work to come. def want more power
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