stuttering

[dsmatt]

So i have been taking it easy since putting my head after having it rebuilt. Some highway driving mostly (been keeping rpms max 4,000). After a good amount of miles i decided to get on the throttle a little more now and it stutters a little just below 5,000rpm and when i shift to second it does it a little more. I noticed now that it does it at high RPM in all gears. Wondering if it could be a fuel pump ready to go out, bad fuel injectors (fuel injector cap and bushing spacer new tho), or maybe cam angle timing degrees. any insight is much appreciated

 

[BigRand]

Gotta test the fuel pressure to know where the problem is. I can't say for sure where it is on your model car, but there should be a fuel pressure test port on or near the fuel rail.

You will want to plug a fuel presssure tester gauge in there and have come up under the hood so that a passenger can see it while driving. Then when you get to the point where it studders you should look and see if the fuel pressure is dropping off or not.

 

[VelocitàPaola]

What car is this for?

 

[dsmatt]

alright i'll give it shot...thx for the advice. It's for my 93 laser n/t

 

[dr1665]

We've got a couple guys down in Tucson. You might check out DSM_SW or az2gnt.net if you cant' figur this out and would like an experienced hand to stop by and take a look.