With the engine hot, there will be quite a considerable resistance, but I have recently seen a car where thep lunger was too tight in the metering head and this cause excessive leaning of the mixture over the rev-range. Based on what you've said, I'd recommend taking the head off, pulling th eplunger, cleaning it and the "hole" and making sure it slides up and down with almost no resistance. A quick check will be that when you take the head off, the plunger tries to fall out. If it doesn't, there's your problem. Martin Matt Spittle wrote: >Forgot to add something to my last message. When my car's fuel >system is fully pressurized, it takes about 3 to 5 lbs of force to >depress the air metering plate. Is it supposed to be like this? It >has always been that way since I purchased the car. When the fuel >system isn't pressurized (i.e., if the fuel lines were just hooked >back up and the fuel pump hasn't run yet), then the air metering >plate is very easy to depress. 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/