4.6 stroker

[Matt99]

I got my 4.6 stroker dropped in my jeep today. We messed with it all day and it started up once and ran well. Then it died and would not start back up with out having to keep the throttle half open and would run like crap and misfire anyway and die again.

This is my set up!

4.6L Low-buck, low CR "rockcrawler"

Jeep 4.2L 3.895" stroke crank
Jeep 4.2L 5.875" rods
Silvolite UEM-2229 +0.040" bore pistons
Increase piston dish volume to 30cc
Mill block deck .025
stock 24lb/hr injectors with stock 39psi FPR for

Every thing else is stock. Im I missing something or what is going on. Im confused cause it ran great once but then died and would not run well again.

[FrankZ]

OBDI or OBDII?
Any codes?
Are you sure the distributor is properly indexed?
Double check all of the vacuum lines/fittings.
What is the fuel pressure at the rail?

[gradon]

I just got done posting on NAXJA how my 4.0 did this when my ACCEL coil failed, so check that out.

[Matt99]

I just got done posting on NAXJA how my 4.0 did this when my ACCEL coil failed, so check that out.

The jeep will start so it cant be the coil.

[4point6]

check the block ground strap and other electrical connections, maybe something rattled loose after initial start up.

x2 on checking vacuum system for leaks

[gradon]

My Jeep would still occasionally start with the bad coil--it didn't completely die.

[Muad'Dib]

Why would a "no start" diagnostic be any different on a stroker then a normal 4.0???

I would start with making sure your TPS is good (maybe swap it out with a spare .. or slap one in from a junkyard).

I would also try another CPS. Sometimes even unplugging it and plugging it back in will cure a no-start problem (if its the CPS thats causing it). That will tell you right away what needs to be replaced.

[Cheromaniac]

Are you sure the distributor is properly indexed?

I'd say it's almost guaranteed that the distributor is at least one tooth off. Here's my write-up on how to correct it:

http://www.angelfire.com/my/fan/dist_index.html

[Matt99]

Why would a "no start" diagnostic be any different on a stroker then a normal 4.0???

I would start with making sure your TPS is good (maybe swap it out with a spare .. or slap one in from a junkyard).

I would also try another CPS. Sometimes even unplugging it and plugging it back in will cure a no-start problem (if its the CPS thats causing it). That will tell you right away what needs to be replaced.

I was just making sure that I did not miss something.