- Location
- where compton meets the water
Is your speedometer/odometer reading correctly? Mine reads 10 mph high with 35 in tires and 4:56 gears.
yeah its dead on
Is your speedometer/odometer reading correctly? Mine reads 10 mph high with 35 in tires and 4:56 gears.
Ever pulled the distributor cap and looked inside?
Don't use starting fluid to check for vacuum leaks. It can travel whereas carb cleaner and brake cleaner stay a liquid much longer.
A common issue is loose intake manifold bolts. Snug them up as needed.
The vacuum line from the intake manifold to MAP sensor is critical. any slight leak and the fuel mixture goes richer.
What would you be looking for inside the cap, let's say I had a similar issue with MPG.
Temps reading normal
cool thank you, will check it outYour temp gauge on a 96 and earlier uses a separate sender from the ECU, so that doesn't really rule anything out, unfortunately.
87-90 4.0: 3 temp sensors
- 1 in the left radiator end cap to turn the electric fan on (HD cooling option only)
- 1 in left side of block low down for the ECU
- 1 in the back left side of the head on the top for the gauge
91-96 4.0: 2 temp sensors
- 1 in the thermostat housing for the ECU, which now also controls the fan
- 1 in the back left side of the head on the top for the gauge
97+ 4.0: 1 temp sensor. It's in the thermostat housing and the ECU controls the fan as well as sending the data to the instrument cluster
Honestly it sounds like you've gone through most stuff. If there is even a small crack in the exhaust manifold - very common at the 2 to 1 collector - it will suck in air in between exhaust pulses and this will cause the O2 sensor to read leaner than it should no matter how much fuel the ECU dumps in to compensate, because that air doesn't ever meet the extra fuel in any meaningful way until they both end up in the catalytic converter. I've seen an XJ get single digit fuel economy due to this problem and jump to 15-16 after it was fixed.
Agree, I don't think it's that far offI hate to tell you this.
but with the 35's and the lift. 10 mpg sounds right.
my stroker gets 8-12 city almost 20 highway. Im running 32's
What would you be looking for inside the cap, let's say I had a similar issue with MPG.