The message to which you are about to reply is shown first. GO TO REPLY FORM



 VIEW    REPLY TO THIS MESSAGE    PRINT   SAVE 

'90 240 stumbling on acceleration, AMM? 200 1990

I am leaning towards a vacuum leak after what you have described.

You really need to pull every hose in the cicuit, right down to the Idle Air Control valve plumbing.
If you have cleaned the throttle body as per FAQs, then what you get a is a very stable steady idle.
If you make sure the Throttle Position Sensor Switch is adjusted so you can hear it click just as you crack the then you get immediate performance off the line.

If you have a bad Fuel Regulator then you can smell gas near the vaccum (THE VACCUM CONNECTION) to the FPR, indicating the membrane in the FPR has been compromised, rare, but it does happen.

If you are down near the Idle Air Control valve, you might want to pull it out and cleena it just for good maintenanc sake as per the FAQs.

If you can get a AMM to repalce the current one with then do it to eliminate the AMM as the culprit.

You may also want to poke your head down and take a look at the Crank Position Sensor wire to see if the insulation/sheathing is torn off or ripped - this COULD be a source of the symptoms - but, I doubt it.

CHECK for VACUUM LEAKS.

--
'92 740 B230F Wagon::'92 B230F 240::'86 B230FT Wagon (RIP-Parts Car):'83 320I::'79 320I::'81 320I::'74 2002::'70 Torino GT Convertible(351C)::1970 Dodge Dart GT 340::'70 Monte Carlo::1979 Dodge Tradesman B300 Custom(360)::'84 SAAB 900S::2004 Dodge Dakota






USERNAME
Use "claim to be" below if you don't want to log in.
PASSWORD
I don't have an account. Sign me up.
CLAIM TO BE
Use only if you don't want to login (post anonymously).
ENTER CAPTCHA CODE
This is required for posting anonymously.
OPTIONS notify by email
Available only to user accounts.
SUBJECT
MODEL/YEAR
MESSAGE

DICTIONARY
LABEL(S) +
IMAGE URL *
[IMAGE LIBRARY (UPLOAD/SELECT)]

* = Field is optional.

+ = Enter space delimited labels for this post. An example entry: 240 muffler


©Jarrod Stenberg 1997-2022. All material except where indicated.


All participants agree to these terms.

Brickboard.com is not affiliated with nor sponsored by AB Volvo, Volvo Car Corporation, Volvo Cars of North America, Inc. or Ford Motor Company. Brickboard.com is a Volvo owner/enthusiast site, similar to a club, and does not intend to pose as an official Volvo site. The official Volvo site can be found here.