So I have a b18b ls swap, and it has no power under 3000rpms



It's almost like I have vtec at 3000rpms it has a ton of power all the sudden( I know it doesn't actually have vtec)



It's got new plugs/wire/cap/rotor/fuel filter

Runs great over 3k

Little bit of popping on decel

Starts in less then a second when I turn the key

 

Double check your mechanical timing. Assuming that is spot on, Have you tried advancing/retarding your distributer at all?

 

ECU?
Timing?

 

I just did the tbelt, so I'm 99% sure that's spot on
Just running an obd1 p75 ecu

Should I use a timing light to adjust the dizzy? Or just play with it and see if it runs better?

 

Timing includes both mechanical AND ignition. So that would mean "No" it isn't timed. If you don't use a timing light then you're doing it wrong.

 

Yeah I had to replace the dizzy due to a bad ignitor, and I don't think I ever readjusted it.. Dang it lol

Ill hit it with the light tonight and see of that's my issue

 

alright so with the timing light, we cant get it to the red mark, even while advancing the distributor 100%..

does this mean my belt is a tooth off?

( we jumped the service connector and the car was right on the white mark, warm idle, and by turning the dizzy full advance i was able to get it about halfway between the red and white marks)

 

Anyone confirm my thoughts? Before I tear it apart, I'm not fond of barkin up the wrong tree lol

 

With the engine not running, you are looking for the "lonely"(static)red mark.
Running and with the timing light on, you need one of the 3 grouped marks (1 should be white). Hope this helps

 

How close are these 3 "grouped" marks?


It was very hard to distinguish the marks..
I could see a red and a white in the timing light..

 

All three marks that are together are w/in a half inch of each other

 

That sounds kinda like what I was seeing as the "white" mark..

I'm doing a valve cover gasket this weekend so ill double check mechanical timing, which means the crank "red" mark is on the pointer on the timing cover correct

Seems to be running much better with a fresh tank of fuel and the dizzy at full advance but I want to be sure it's right

 

Correct. I remember it like this- red is stopped(engine off) like a traffic light. Make sure you rotate your engine by hand 3-4 rotations counterclockwise w/plugs out(nice and easy w/o compression) Before trying to start. This is IF you adjust static timing...