98v70dad
Active Member
- Joined
- Oct 8, 2017
- Messages
- 325
- Reaction score
- 38
- Points
- 28
- Location
- GA
- Vehicle Year
- 1996
- Make / Model
- Ford
- Engine Size
- 3.0L
- Transmission
- Automatic
- 2WD / 4WD
- 2WD
What is the fuel pressure at the rail supposed to be?
I just measured mine and I get 38 psi pretty consistently after pressuring it up by turning the key to allow fuel pump to spin up 3 times and then looking at the gauge.
I get about 32 - 34 psi with the engine running. Higher psi at idle and lower as rpm's go up.
I'm getting really poor acceleration performance and I'm working on figuring out the cause. It hasn't always been as bad as it currently is. I think the fuel pressures I've measured are well below spec but I don't have the spec figures to compare against.
Things I've done, in order: (I have no codes and truck has 72,000 miles on it +/-)
1) new coil pack - minor improvement
2) intake manifold sea foam treatment - who knows - maybe a little improvement - the smoke is fun
3) exhaust inspection with hammer and flashlight - no holes noted - nothing rattling - exhausts last a long time in the south.
4) fuel pressure measurements (results above) - filter was replaced about 30,000 miles ago (2 years)
5) MAF cleaning with MAF cleaner
6) new air filter - old one was 2 years old - a little dirty but not horrible.
I just measured mine and I get 38 psi pretty consistently after pressuring it up by turning the key to allow fuel pump to spin up 3 times and then looking at the gauge.
I get about 32 - 34 psi with the engine running. Higher psi at idle and lower as rpm's go up.
I'm getting really poor acceleration performance and I'm working on figuring out the cause. It hasn't always been as bad as it currently is. I think the fuel pressures I've measured are well below spec but I don't have the spec figures to compare against.
Things I've done, in order: (I have no codes and truck has 72,000 miles on it +/-)
1) new coil pack - minor improvement
2) intake manifold sea foam treatment - who knows - maybe a little improvement - the smoke is fun
3) exhaust inspection with hammer and flashlight - no holes noted - nothing rattling - exhausts last a long time in the south.
4) fuel pressure measurements (results above) - filter was replaced about 30,000 miles ago (2 years)
5) MAF cleaning with MAF cleaner
6) new air filter - old one was 2 years old - a little dirty but not horrible.