Mechanics

MISSING OR SHUDDER

1986 Jeep CJ7 • 250,000 miles

1) Recently when driving my 1986 CJ7 Jeep I have noticed some hesitation where the Jeep kind of misses (like it dies for a second, a chug), but then picks right back up. I notice that his happens when pulling away from a dead stop; at the light or a stop sign. It doesn’t do it regularly, rather only once in a while. Also noticed it while doing 60 MPH while on the highway, just out of the blue. I can’t confirm, but when it happens on the highway it appears to happen or be brought on just after driving over a rough patch on the highway like a crack, or pot hole in the pavement which in turn seems to disturb the transmission to make it miss; or, at least it appears to seem that way. The Jeep then shudders violently sounding like the transmission is in the wrong gear causing the Jeep to slap back and forth.

This just started happening last couple few weeks. Although in fairness, I just fixed a situation where the Jeep wouldn’t start because it had No Spark, and the distributor was moved, but timing never really set by timing light, but rather by ear.

Wondering, could it be timing, requiring the timing to be set?

2) Another issue, not sure that it’s related to the above. Upon starting up from a dead stop (at a light or stop sign) with wheels turned to right, so making a right hand turn (this is when I notice it most), almost every other time I make this right hand turn, the transmission seems to shake/shudder as opposed to starting off smooth. Clutch was replaced a couple of years ago (Luuk), and has maybe 20 – 30 K since replacing. At other times (especially when pulling straight ahead), it starts of very smooth to the degree you wouldn’t know it was a standard transmission.
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0h canada
October 26, 2011.




Definitely have the timing set correctly. Incorrect timing and ignition problems can often feel like a buck/j3rk coming from the transmission.
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Dan_K
Oct 26, 2011.
0h canada

AIN'T SEEN YOU IN A WHILE

I DO NOT REMEMBER YOUR ENGINE SIZE

FOR SURE, YOU NEED TO TIME IT....ADJUST CARB.....CHECK TIMING...ADJUST CARB....IDLE SPEED AND MIXTURE

IT'S NOT GOOD MESSIN' WITH OTHER STUFF, UNTIL YOU KNOW, EVERYTHING IS TWEAKED TO FULL POTENTIAL.....IF THE PROBLEM PERSISTS, WE WILL THEN, INVESTIGATE OTHER STUFF

A TIMING LIGHT (NON-ADJUSTABLE TYPE IS BEST) AND A TACH/ DWELL METER TO TUNE CARB, SET IDLE SPEED.........YOU CAN USE A VACUUM GAUGE TO TWEAK THE CARB, I FIND THE TACH TO BE MORE "USER-FRIENDLY" TRYING TO PEAK IT OUT. I SELDOM USE THE VACUUM GAGE TO TUNE.

I'M GONNA SEND YOU A LINK TO LOOK OVER, AS FAR AS "HOW" (IF YOU CAN DE-CIPHER MY LINGO!) I EXPLAIN BETTER IN PERSON!

THE GUY IN THIS LINK HAS A 304----I SORTA USED MY 258 PICS TO EXPLAIN THINGS.....AND TRIED TO TRANSLATE OVER TO "304", SO HE WOULD UNDERSTAND.

LET ME KNOW IF YOU SEE HOW IT WORKS, GIVE ME ENGINE SIZE, I MAY BE ABLE TO "BOTTLE FEED" YOU THE INFO YOU NEED, MAYBE BETTER EXPLANATIONS THAN WITH THE GUY IN THE LINK.

http://www.2carpros.com/questions/1980-jeep-cj7-timingtuning-problem-with-a

WAITIN' ON YOU

THE MEDIC


Tiny
CJ MEDEVAC
Oct 27, 2011.

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