4.6 stroker

Newbies, and basic Stroker Recipes... Get started with your first stroker here!!
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Matt99
Where's the "any" key?
Where's the "any" key?
Posts: 21
Joined: March 16th, 2008, 9:59 am

4.6 stroker

Post by 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. :evil:

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.
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FrankZ
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Posts: 93
Joined: April 3rd, 2008, 6:44 am
Stroker Displacement: 4.6l

Re: 4.6 stroker

Post by 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?
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gradon
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Posts: 1353
Joined: February 13th, 2008, 5:33 pm
Stroker Displacement: 4.6/280ci
Vehicle Year: 1996
Vehicle Make: Jeep
Vehicle Model: Cherokee
Location: DC

Re: 4.6 stroker

Post by gradon »

I just got done posting on NAXJA how my 4.0 did this when my ACCEL coil failed, so check that out.
Matt99
Where's the "any" key?
Where's the "any" key?
Posts: 21
Joined: March 16th, 2008, 9:59 am

Re: 4.6 stroker

Post by Matt99 »

gradon wrote: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
I think I'll order a "tab"
I think I'll order a "tab"
Posts: 46
Joined: February 14th, 2008, 10:39 am
Stroker Displacement: 4.6
Vehicle Year: 1997
Vehicle Make: Jeep
Vehicle Model: Cherokee

Re: 4.6 stroker

Post by 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
-Andy

'97 XJ 4.6L Stroker
'00 Explorer
'67 Mustang Fastback (project)
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gradon
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Posts: 1353
Joined: February 13th, 2008, 5:33 pm
Stroker Displacement: 4.6/280ci
Vehicle Year: 1996
Vehicle Make: Jeep
Vehicle Model: Cherokee
Location: DC

Re: 4.6 stroker

Post by gradon »

My Jeep would still occasionally start with the bad coil--it didn't completely die.
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Muad'Dib
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Posts: 1497
Joined: January 8th, 2008, 10:55 am
Stroker Displacement: 4.7L
Vehicle Year: 1990
Vehicle Make: Jeep
Vehicle Model: Cherokee
Location: Bend, Oregon
Contact:

Re: 4.6 stroker

Post by 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.
If it feels right, then STROKE it!
You're lucky that hundred shot of CAPS LOCK didn't blow the welds on the forum!!
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Cheromaniac
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Posts: 3180
Joined: March 8th, 2008, 12:58 pm
Stroker Displacement: 4563cc
Vehicle Year: 1992
Vehicle Make: Jeep
Vehicle Model: Cherokee
Location: Cyprus
Contact:

Re: 4.6 stroker

Post by Cheromaniac »

FrankZ wrote:
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
1992 XJ 4.6 I6 - 5MT - Stroker build-up, Stroker "recipes" Sold
1995 Mustang GT - 4AT - Modded Sold
2006 Mustang GT - 5MT - Modded Midlife Crisis Car :mrgreen:
Matt99
Where's the "any" key?
Where's the "any" key?
Posts: 21
Joined: March 16th, 2008, 9:59 am

Re: 4.6 stroker

Post by Matt99 »

Muad'Dib wrote: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.
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