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-   -   Stumbling 850 (https://volvoforums.com/forum/volvo-850-16/stumbling-850-a-50213/)

AlanS 02-10-2011 03:08 PM
Stumbling 850
 
1995- 850 NA.
Alright...car running terrible...stumbling. Brought it to my friend who has a code reader (I didn't know about the onboard one). Codes: PO137, PO400, P-1310, P-301. He cleared all codes...now I am left with the results.
This all seemed to increase after a 'tune up' about two months ago...new plugs (the multi-prongs ones from Groton), new cap,wires and rotor. It is getting increasingly worse...stumbling along.
What to do?

rspi 02-10-2011 04:45 PM
Anytime I hear about poor running, I first look at vacuum, then MAF.

gdog 02-12-2011 12:40 AM
Originally Posted by AlanS (Post 256097)
1995- 850 NA.
Alright...car running terrible...stumbling. Brought it to my friend who has a code reader (I didn't know about the onboard one). Codes: PO137, PO400, P-1310, P-301. He cleared all codes...now I am left with the results.
This all seemed to increase after a 'tune up' about two months ago...new plugs (the multi-prongs ones from Groton), new cap,wires and rotor. It is getting increasingly worse...stumbling along.
What to do?
Agree w/Jack; look at what the codes are telling you and ck the compression.

AlanS 02-13-2011 05:07 PM
Looks like, and I will know for sure after ride tomorrow...Cracked insulator on #1 sparkplug...nice crack! It idled smoothly...long ride tomorrow. As for the EGR...looks like that will have to wait for some warmer weather.


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