Why so rich?
#1
Why so rich?
I have a 97 F150 XLT styleside thats pretty much stock. 4.2 V-6, automatic power everything. K&N filter. Stock 255x16 tires.
Bought it a couple of months ago. Had 89k,but ran the vin and the engine was changed at 72k by the ford dealer.Also changed the fuel rails due to a recall. Engine runs pretty good gets 19mpg on the highway and about 14mpg in town. It seems that it is burning too rich,the exhaust pipe tip is black and occasionally when I shut it down I can smell fuel.Checked it pretty close and can't find any leaks external. Thought it might have a bad injector but it runs good and I don't get a check engine light. Does'nt miss or anything. Any suggestions?
(I am going to have another pre-smog check done to check for excessive hydro-carbons, if it does'nt pass,then the dealer did an illegal smog on the vehicle)
Thanks
Bought it a couple of months ago. Had 89k,but ran the vin and the engine was changed at 72k by the ford dealer.Also changed the fuel rails due to a recall. Engine runs pretty good gets 19mpg on the highway and about 14mpg in town. It seems that it is burning too rich,the exhaust pipe tip is black and occasionally when I shut it down I can smell fuel.Checked it pretty close and can't find any leaks external. Thought it might have a bad injector but it runs good and I don't get a check engine light. Does'nt miss or anything. Any suggestions?
(I am going to have another pre-smog check done to check for excessive hydro-carbons, if it does'nt pass,then the dealer did an illegal smog on the vehicle)
Thanks
#2
#3
maybe its ok
Well, the black tailpipe thig is totally noramal for these trucks.(do a search in the exhaust forum it has been discussed a number of times)Every one that I have seen or owned has had a the soot around the tailpipe(especially the 4.2s).My truck-a y2k f150 4x4 with the six has it and I just had the 15k service.Dealer said it is in perfect running order.I think the way to get rid of the soot is to install an aftermarket ignition system.Good luck
#4