Trying to find the info on which plug to remove for Fuel pressure check. I think one is after the filter and one is before the filter. I read it some time ago, I tried searching for it but it will take all day.

Thanks Ron

 

the lower one is after the filter.
top it before filter.

 

Great Thanks!! Will be back with results shortly. Should I check it before and after??

 

Unless your filter is really dirty, the pressures should be the same.

 

Just changed the Filter about a Month ago.

 

prob wont matter then. when I installed my fuel pressure gauge a few weeks ago, I tried both ports with a filter that had 15k on it. There was no difference in pressure between the two ports.
Matter of fact, it didn't change after I put a new filter in either.

 

Back with results!!

Idle 69-70 PSI even after warm up and ran down the road!

Driving on 100 hp position TS Chip dropped to 62 at full throttle for about 5 Seconds. Then back up to 69 -70 PSI.

I have the FPR mod with the lowest pressure spring installed. This is higher than what the spring pressures ratings are or is the ratings under driving conditions?

 

Every truck will be different. The machining on the FPR will also have some effect on it too. Those numbers are close to what I see including the pressure drop.

 

looks good to me.