Issues with new crate stroker

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hscrugby
Posts: 2
Joined: April 12th, 2010, 9:21 pm
Stroker Displacement: 4.6
Vehicle Year: 1998
Vehicle Make: Jeep
Vehicle Model: TJ

Issues with new crate stroker

Post by hscrugby »

Just finished getting it in tonight.
Have ford mustang injectors from ebay, and it's a titan engine 4.6/7 stroker.
She is hard to start, but does start, idles great. Nice and smooth.
BUT once I go to rev it to 2k to do the initial break in for 20 minutes they recommend, she gets real rough. Kind of a misfire and even a bit of a back fire.
I checked the index mark is right at 0 when she is pointing at the #1 plug on the distributor. (Well, had that off by 180 at first, so swapped plug wires 180 degrees. But that shouldn't matter right? I realized that I just set it on 0 and didn't check for TDC so I did that before I even started it. But since the engine was in, I was to lazy to pull distributor back out )

So my thoughts are this:
Possible bad injector? It can keep up at idle, but dies from fuel at RPM.
Bad plug wires? Works at low speed RPM makes it vibrate and misfire?
Bad sensor somewhere? Replaced CPS with a new one, but I guess the new one could be bad?
Bad ignition coil? Fine at idle, but dies when a load hits?
Bad fuel pump? Can't keep up with the new injectors?

I don't want to run it for the full 20 minutes this rough, as I'm nervous something is really wrong, and I'd rather not blow up my new engine.

Thanks for any help
jbxx
Donator
Donator
Posts: 169
Joined: October 28th, 2009, 4:26 pm
Stroker Displacement: $.6 mistake?
Vehicle Year: 1986
Vehicle Make: Jeep
Vehicle Model: CJ7

Re: Issues with new crate stroker

Post by jbxx »

Sounds like the dizzy is off by a tooth.
I remember reading somwhere that at TDC the distributor rotor is supposed to be at the edge of the contact
in the cap at #1. Read up on indexing the dizzy.
Good luck!
J.B.
hscrugby
Posts: 2
Joined: April 12th, 2010, 9:21 pm
Stroker Displacement: 4.6
Vehicle Year: 1998
Vehicle Make: Jeep
Vehicle Model: TJ

Re: Issues with new crate stroker

Post by hscrugby »

Haha.
Was a bad rotor was all it was.
I pulled the distributor etc rechecked everything and it looked good.
I went to put it back together, and couldn't find the rotor. Grabbed a spare, and she runs perfectly.
Looked some more found the rotor, and the plastic "cap" that sits on the distributor is cracked.

Now to fix my clutch (apparently I broke something and it won't disengage to go in gear) and she'll be ready to drive.

Thanks for the reply.
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SilverXJ
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Posts: 5790
Joined: February 14th, 2008, 7:14 am
Stroker Displacement: 4.6L
Vehicle Year: 2000
Vehicle Make: Jeep
Vehicle Model: Cherokee
Location: Radford, Va

Re: Issues with new crate stroker

Post by SilverXJ »

At least it was an easy fix
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