spinning fast........
#1
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Year: 89
Model: Cherokee
Engine: 4.0
spinning fast........
My 89 4.0 has been running great since the HNS saga was finally solved (different injectors) so i have been doing cosmetic trim work.
But today I go to start her up & she spun real fast & didn't want to start. Like there was no compression. I waited about 30 seconds & tried again & this time it was more of a normal rotation & she started but didn't run very smooth at all.
I was very low on fuel & didn't know if this could be the cause of the fast spin & no start? I put a gallon in the tank & she started but ran ruff on the way to the gas station. I filled her up & the idle & ruff running went away for the most part.
Yesterday I almost got stranded in the boon-docks & had to put 5 gallons of 10% ethanol to get back to civilization. Possible this had anything to do with it?
I've never had it spin fast like today when starting.......
But today I go to start her up & she spun real fast & didn't want to start. Like there was no compression. I waited about 30 seconds & tried again & this time it was more of a normal rotation & she started but didn't run very smooth at all.
I was very low on fuel & didn't know if this could be the cause of the fast spin & no start? I put a gallon in the tank & she started but ran ruff on the way to the gas station. I filled her up & the idle & ruff running went away for the most part.
Yesterday I almost got stranded in the boon-docks & had to put 5 gallons of 10% ethanol to get back to civilization. Possible this had anything to do with it?
I've never had it spin fast like today when starting.......
#2
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Year: 90,84
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Engine: 4.0,2.5
That's weird....was it extra hot? I think all we get here is 10% ethanol, so I doubt that's it. I've had other things crank fast when it was half **** firing...borderline out of gas? Since adding fuel helped, gotta wonder.
Hey, did you do the 746 injector swap? If so, what to you think?
Hey, did you do the 746 injector swap? If so, what to you think?
#3
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Year: 89
Model: Cherokee
Engine: 4.0
That's weird....was it extra hot? I think all we get here is 10% ethanol, so I doubt that's it. I've had other things crank fast when it was half **** firing...borderline out of gas? Since adding fuel helped, gotta wonder.
Hey, did you do the 746 injector swap? If so, what to you think?
Hey, did you do the 746 injector swap? If so, what to you think?
As far as the firing I have new plugs(.35) brass contact dizzy & rotor, belden wires, coil, ICM, I could go on & on.......
It's been running great. Just this time cranking it was spinning like a *&^%$# & I held that crank for about 6 to 10 seconds. I'm thinking WTH & so I try again % the second attempt wasn't as fast & she started but it was gimpy. I shut down & switch back to ON & I hear the pump kicking. It's a new BOSCH if you remember. So I go to the shop & get 1 gallon & put that in cause I know I am dang near empty & I wonder if maybe my first attempt i didn't get a good prime.
She starts & I haul a$$ to chevron & after i gas up everything seems normal.
That fast spin spooked me though. I don't know if a real fast spin could be the result of an almost empty tank?
As for the 746's yes I put them in. I posted about them on another thread a while back but you may have missed it.
I think 1 or 2 of them were sticky so I ran a can of BG44K through the first tank. I'm pleased. With the old injectors I was getting maybe 10mpg. Now I average 18 to 20 town & highway. I've convinced myself my mileage has doubled........he......he.......
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