--- In dmcnews@xxxxxxxxxxxxxxx, doctorDHD@xxxx wrote Dave, I thuoght I already had explaned it but here goes so read carefully! When a B28 engine is cold is when it's thirstiest for fuel and the Lamda (enrichment) curcuit is in a fixed rich mode. It therefore calls for IMHO more fuel than a partially clogged fuel filter can deliver in this short peak demand period. Does that make any sense? Rob Grady, P.J.Grady Inc. > > > Can someone explain to me how a bad fuel filter can cause hesitation and > back firing only when the engine is cold? > > > > Thanks, > > D² & 6530 > > Dan, > > Before you try to trouble shoot the fuel injection I would suggest changing > the fuel filter. That corrects the symptoms you describe more than half of > the time. Do you know when it was last changed? A bad CPR won't allow you to > accelerate at all for a few minutes with a cold engine so I doubt it's that. > > Here is something ponder over. When I start my car after sitting for > the night it starts up fine. When I give it gas to get out of my > driveway and up the street, I notice I lose acceleration. I then here > a slight backfire in about 3-4 quicks pops. After this the car runs > fine and I don't get it again until the next day after sitting > overnight. Any thoughts on the cause of this? Thanks! > > > > > > > > [Non-text portions of this message have been removed] > To address comments privately to the moderating team, please address: moderators@xxxxxxxxxxx For more info on the list, tech articles, cars for sale see www.dmcnews.com To search the archives or view files, log in at http://groups.yahoo.com/group/dmcnews Yahoo! Groups Links <*> To visit your group on the web, go to: http://groups.yahoo.com/group/dmcnews/ <*> To unsubscribe from this group, send an email to: dmcnews-unsubscribe@xxxxxxxxxxxxxxx <*> Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/