stroker misfire/skip

userbmx1315

NAXJA Forum User

Location

Dallas, NC

• Oct 19, 2009

• #1

the jeep started gettin i minor misfire, or atleast it sounded like it.(no codes) so i changed the injectors from the mustang to stock. no change (just to besure it wasnt a clogged injector. then i got new plugs, no change. i check to make sure the spark plugs wasnt arcing. they wasnt. so i decided top pull the rods since that was an easy thing to do and was told cold be a problem. well i have 4 rods with a minor bend. so ive got new ones on order now.

any ideas if this is my problem or am i missing something?

 

RoyalXJ

NAXJA Forum User

Location

West Deptford, NJ

• Oct 20, 2009

• #2

push rods bent?? what are the specs on your motor?

 

4

4wdParakeet

NAXJA Forum User

Location

Olathe, Ks

• Oct 20, 2009

• #3

did you deck the block. When I decked my block the pushrods had to be .020 shorter I think.


Parakeet

 

vegas_baja

NAXJA Forum User

Location

las vegas

• Oct 20, 2009

• #4

Sorry dude, I could barely read that.
Either you're too drunk to type, or you royally failed english class.
Check your pushrod length.

 

gradon

NAXJA Forum User

Location

DC

• Oct 20, 2009

• #5

A lot of royal in this thread(3 indian browns down). Stock pushrod length is 9.641" so if you had the head shaved X thousandths of an inch and the block decked Y thousandths of an inch, you want a pushrod Z thousandths of an inch. Z=9.641"-X-Y. Here's a thread with some different pushrod lengths:
http://www.jeepstrokers.com/forum/viewtopic.php?f=34&t=1191

 

L

loren mcclellan

NAXJA Forum User

Location

monte vista colorado

• Oct 20, 2009

• #6

gradon said:

A lot of royal in this thread(3 indian browns down). Stock pushrod length is 9.641" so if you had the head shaved X thousandths of an inch and the block decked Y thousandths of an inch, you want a pushrod Z thousandths of an inch. Z=9.641"-X-Y. Here's a thread with some different pushrod lengths:
http://www.jeepstrokers.com/forum/viewtopic.php?f=34&t=1191

Click to expand...

not to mention head & spring heighth that's been done to the head and what cam, get some mech. die spray the tip of your valvestem, get an adjustable pushrod check tool (cheap) and make sure the wear pattern is in the middle of the valve stem. It's an easy and cheap check to get it right.

 

T

tomcat

NAXJA Forum User

NAXJA Member

Location

North NJ

• Oct 20, 2009

• #7

meh, i am running a decked block (at 0.020) and the MP .043 Head gasket, and running the stock valvetrain on the comp 231 cam with no ill effects.

 

RoyalXJ

NAXJA Forum User

Location

West Deptford, NJ

• Oct 20, 2009

• #8

tomcat said:

meh, i am running a decked block (at 0.020) and the MP .043 Head gasket, and running the stock valvetrain on the comp 231 cam with no ill effects.

Click to expand...

you're gonna get valve float. stock springs arent meant to handle that amount of lift

 

Joshooha

NAXJA Member

NAXJA Member

Location

Charlotte NC

• Oct 20, 2009

• #9

Well hell...if he bent some rods, how do you think those valves are holding up?.

 

T

tomcat

NAXJA Forum User

NAXJA Member

Location

North NJ

• Oct 20, 2009

• #10

RoyalXJ said:

you're gonna get valve float. stock springs arent meant to handle that amount of lift

Click to expand...

oops, i meant rods and rockers. springs are GM performance beehives.

 

userbmx1315

NAXJA Forum User

Location

Dallas, NC

• Oct 21, 2009

• #11

the block and head have not been decked. the p.o. had the same set up. all i did was swap blocks. his wasnt shaved either.

i have ran it like this for about 2 months. the only thing diff was prob the gasket. the one that i got with the motor from the shop was metal with blue sealer(guess it was a type of rubber sealer) the recent gasket was a stock replacement cork (guess its cork)