'86 Vette, modified (see signature).
I noticed during a drive to a friends house yesterday...the car seemed to be 'loading up' on me. (not noticeable when moving along, but especially when coming to a stop, and pushing in the clutch).

Had the top down, and 'got into it' a little bit, but saw no signs of black smoke, or any smoke for that matter. Hmmm!!!

I'm still using the 'stock injectors' that came with the car. (I tried using Accel, 25K miles ago, but the performance was worse...so I switched back to the stock injectors). It ran great up to this point.

The feul pressure regulator I use is from TPIS, and through earlier seat of the pants, WOT tests...I got it set at 47psi, where it seemed to perform the best.

Questions: How often do we need to replace the fuel pressure regulator? Do they go bad, and how can I tell for sure, it is bad? Can they be repaired? Does the 'spring' inside go bad? Where would I get a regulator spring...if in fact that's the problem?

My stock injectors probably have 100K miles on them to this point. How can I tell if they are bad?

It's not the costs of new parts that bothers me...it's just a 'need to know thing'.

I'm hoping some of the forum members have come across this senario before, and might have a suggestion or two.

All thoughts and comments appreciated.

 

Can't help you much on the "rich" factor...could be a senor or two misreading but if you search past posts on fuel injectors, there a couple of good places where you can send your stock injectors to be reconditioned for a very reasonable price.

As far as regulators go, they should have a life expectancy of at least 50,000 miles if not more...

PS: I just recently put in Accel Injectors (like 2 days ago!)...am interested in what kind of problems you ran into :confused: as am getting ready to drive it down to the Cruise-In next week??? Maybe we'll see you down there :cheers:

 

I use the accel's in my car and they seem to work fine. Other than bad programming(which is being resolved as we speak), I have yet to complain.

 

Quik86,
I appreciate your reply.
I will check the forum as you suggest.
What I didn't like about the Accel injectors, they seemed to make the engine 'fall' all over itself.
I tried from a stand still, a 20 MPH roll, 2nd gear 30MPH roll, etc.etc., and got the same results.
Went back to the stock injectors...and the difference was so noticeable...I haven't given the injectors a second thought......................until now!!

 

Do you have a Fuel Pressure Guage? Does the rail hold fuel pressure when the car is off? If it bleeds down quickly it is either the injector leaking down or the fuel pump check valve. Do you have any vacuum leaks?

BTW Usually when the bladder burst in the AFPR, , your vaccum line will have or smell like gas.

 

I'm pretty sure it's the programming causing this problem. I'm currently experiencing an overly rich idle which I'm going to fix through programming. My friend had a similar problem with the car running rich, bogging down at WOT and a little sloppy when crusing(missing). I changed the injector constant, lowered the GPS readings on the first MAF table and it helped a great deal (he has an auto and is running 24lb/hr injectors).

The accel injectors are great for the money and perform well considering calibrations are done correctly.