Stroker installed and running, No highway power?

[RayburnRacer]

i just installed and brroke in my new western engine built 4.7l stroker. I put a pacesetter header on, but other than that its pretty much stock(throttle body, injectors, ect.). Motor cranks and idles like a champ and runs good around town. the year is a 2001 wrangler and still has the stock injectors. Here is my issue:

1st and 2nd gear will run any rpm and in a hurry. #rd gear will run god til around 3250 then lose power and it only gets worse in 4th and 5th. Automatically i assume too small of injectors and running lean under load.

Can any one tell me iff thats is my issue and that bigger injectors will surely fix my problem?

also, My jeep has the distributorless ignition. So when i installed the Indexer (i think thats what they call it) i went by the book and i would assume i did a good job by the way it idles and runson the lowend. I can't check the timing since i cant get mmy spark plug wire clamp around the boot of the power packs.

My question is, do i have to do anything to make sure the timing and everything is good? can i do this myself? or do i need to take it to the dealership?

Thanks,

[SilverXJ]

The only sensor that controls spark timing is the CPS on the bell housing. The cam sensor controls fuel injector timing. I doubt the injectors are the problem. Re check the cam sensor's install. #1 at TDC, put tooth pick in sensor to lock rotator, drop sensor in with plug toward the rear.

[RayburnRacer]

Silver XJ, Thats what i did when i intalled it. Can i twist the cam sensor in either direction to try to tune it in.

So on a efi 4.0l with a distributor the ignition iis taken from the distributor and the injection is taken off the crank position. Then when they went to Distributorless they swapped and now use the cam sensor (where the distributor once was) to time the injection and the ingition is fired of the crank. If so thats wierd...

So there is no reason to bring this to the dealer so they can reflash and make the computer except the new positions. I thought i read that somewhere but i guess i was mistaken.

I alos thought everyone was complaining about there load and highway driving when they had to lean of injectors. Like i said this thing drive great with no issue until you go in higher gears.

Injectors or is there something wrong....

[SilverXJ]

Silver XJ, Thats what i did when i intalled it. Can i twist the cam sensor in either direction to try to tune it in.

sort of. What you want to do is put a mark on the sensor drive. Start the jeep, loosen the bolt and turn it one way until it starts to run rough, mark the spot on the engine block where the mark on the drive lives up. Rotate it the other direction until it starts to run rough again, mark that spot on the engine block. Find the middle and align the mark on the drive with that.

So on a efi 4.0l with a distributor the ignition iis taken from the distributor and the injection is taken off the crank position. Then when they went to Distributorless they swapped and now use the cam sensor (where the distributor once was) to time the injection and the ingition is fired of the crank. If so thats wierd...

The sensor in the distributor pulled the injector timing as well. CPS is always used for spark.

So there is no reason to bring this to the dealer so they can reflash and make the computer except the new positions. I thought i read that somewhere but i guess i was mistaken.

They can only flash for things such as TSB, for example there is a TSB to clear up a 00+ cold start issue.

I alos thought everyone was complaining about there load and highway driving when they had to lean of injectors. Like i said this thing drive great with no issue until you go in higher gears.

While I don't doubt you need larger than stock injectors, I doubt that is the problem. However, an idea, if the small injectors combined with low fuel pressure.. that might make something like this happen. Have you checked your fuel pressure?

From experience using a stroker with stock injectors won't cause it to stop the engine accelerating at 3000.

I would get the larger injectors regardless. You stay in the throttle too long while running the stock injector and you valves will be come tulip-ed shaped.. when they aren't suppose to be, among other nasty things. Now that I think of it I had to replace the fuel pump on a WJ because it was hitting a brick wall at 4000 RPM.