I have an 87 5.0 with a mass air a9p ecu conversion, cobra intake, 3.73's and full exhaust. Stock tb, stock mass, stock injectors.
I am getting about 160 miles to a tank which is around 13.8 miles a gallon.
The car never had Great gas mileage but it used to get about 220 miles to a tank before the mass conversion and intake.
I have tried to run seafoam thru the intake and oil. With no help. Timing is set at 12 degrees and I run 89 octane gas. Car drives very well idles perfectly, lets out a bit of black smoke usually from the right exhaust pipe when at wot.
I have done a tune up about 4 months ago; plugs were fine except the #4 and 8 which showed white buildup. My tail pipes are black.
I haven’t tried pulling the codes yet, but will try to do it today, so that I can give some feedback. I had a friend who had similar problem; it resulted to a leaky injector. How can I determine which injector is bad if this is my problem?
Originally I though my fpr was not working properly, I had it tested by a mechanic and he stated that it was fine and fuel pressure was good too. I’m open to any opinions, just trying to get this resolved before I take it to the dyno by the end of the month to get base numbers before I do h/c/i. Thanks in advance. \
:SNSign:
I am getting about 160 miles to a tank which is around 13.8 miles a gallon.
The car never had Great gas mileage but it used to get about 220 miles to a tank before the mass conversion and intake.
I have tried to run seafoam thru the intake and oil. With no help. Timing is set at 12 degrees and I run 89 octane gas. Car drives very well idles perfectly, lets out a bit of black smoke usually from the right exhaust pipe when at wot.
I have done a tune up about 4 months ago; plugs were fine except the #4 and 8 which showed white buildup. My tail pipes are black.
I haven’t tried pulling the codes yet, but will try to do it today, so that I can give some feedback. I had a friend who had similar problem; it resulted to a leaky injector. How can I determine which injector is bad if this is my problem?
Originally I though my fpr was not working properly, I had it tested by a mechanic and he stated that it was fine and fuel pressure was good too. I’m open to any opinions, just trying to get this resolved before I take it to the dyno by the end of the month to get base numbers before I do h/c/i. Thanks in advance. \
:SNSign: