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  #1  
Old 01-06-2003, 11:37 AM
Potomac German Auto
 
Join Date: Mar 2002
Location: Frederick, MD
Posts: 407
Angry Underload issue ?

Just when I thought I was in the clear. I changed too many parts to list.

Including the CIS distributor & the airflow meter, just to name a few. Also I swapped the EZL, ECU, wires, plugs, coil, crank position sensor, etc, etc, etc..................

50% of the time my car runs good, but is lacking in the higher RPM ranges. The other 50% of the time is runs like crap, then all of the sudden kicks in and takes off.

The biggest problem I am having is that it only occurs under load.

If the car is in nuetral the throttle reponse & accelerator works just fine.

Any thought ?
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1994 E500 (MY SUNDAY DRIVER)
1993 190E SPORTLINE LE W/ M104 SWAP
1997 C230
2002 ML320
2000 BMW 528I (WIFEY'S CAR)

"Excuses are crutches for the unfounded."
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  #2  
Old 01-06-2003, 09:12 PM
Registered User
 
Join Date: Mar 1999
Location: Suwanee, GA, USA
Posts: 4,712
There is an altitude compensator that I have seen fail. IT is located behind the battery...Looks like a map sensor with no vacuum line. Just electrical.
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Benzmac:
Donnie Drummonds
ASE CERTIFIED MASTER AUTO TECHNICIAN
MERCEDES SPECIALIST 11 YRS
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  #3  
Old 01-07-2003, 09:30 AM
Potomac German Auto
 
Join Date: Mar 2002
Location: Frederick, MD
Posts: 407
Thumbs up

Thanks Donnie, I'll check that out !!
__________________
1994 E500 (MY SUNDAY DRIVER)
1993 190E SPORTLINE LE W/ M104 SWAP
1997 C230
2002 ML320
2000 BMW 528I (WIFEY'S CAR)

"Excuses are crutches for the unfounded."
Reply With Quote
  #4  
Old 01-07-2003, 02:47 PM
Potomac German Auto
 
Join Date: Mar 2002
Location: Frederick, MD
Posts: 407
Question Hmmmmmmm?

I located and pulled out the Altittude adjustment compensator.

My only ? is where does the signal go? To the KE control or the EZL !
__________________
1994 E500 (MY SUNDAY DRIVER)
1993 190E SPORTLINE LE W/ M104 SWAP
1997 C230
2002 ML320
2000 BMW 528I (WIFEY'S CAR)

"Excuses are crutches for the unfounded."
Reply With Quote
  #5  
Old 01-08-2003, 11:50 AM
Potomac German Auto
 
Join Date: Mar 2002
Location: Frederick, MD
Posts: 407
Post Scratching head still !!!

No it's not dandruff !!!

I swapped out the altitude adjustment compensator last night.

Heres the skinny on what's going on.

The car's RPM will stay at say 4500 if I shift out @ 4500. Only with the clutch depressed for more than 10 seconds will the RPM's drop.

Here's another scenario of what is happening.

If I am sitting at a light in neutral waiting, sometimes the RPM's will slowly climb up to 3000 RPM by itself.

Any other thoughts guys?

Ignition related ? Maybe ? Due to the fact that it is not a constant problem. It is only sporadic. But when it does run seemingly ok it still lackes power !!!
__________________
1994 E500 (MY SUNDAY DRIVER)
1993 190E SPORTLINE LE W/ M104 SWAP
1997 C230
2002 ML320
2000 BMW 528I (WIFEY'S CAR)

"Excuses are crutches for the unfounded."
Reply With Quote
  #6  
Old 01-08-2003, 12:48 PM
PaulC
Guest
 
Posts: n/a
Re: Scratching head still !!!

Quote:
Originally posted by Potomac Pat
No it's not dandruff !!!

Here's another scenario of what is happening.

If I am sitting at a light in neutral waiting, sometimes the RPM's will slowly climb up to 3000 RPM by itself.

Any other thoughts guys?

That sounds like a lean-out situation, perhaps caused by a vacuum leak. How are your manifold gaskets?
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  #7  
Old 01-08-2003, 12:55 PM
Potomac German Auto
 
Join Date: Mar 2002
Location: Frederick, MD
Posts: 407
Gaskets !!

I just put new intake & exhaust manifold gaskets in less than 1 year ago.

__________________
1994 E500 (MY SUNDAY DRIVER)
1993 190E SPORTLINE LE W/ M104 SWAP
1997 C230
2002 ML320
2000 BMW 528I (WIFEY'S CAR)

"Excuses are crutches for the unfounded."
Reply With Quote
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