Engine misses at speed!

yjking · 07-01-2009, 11:04 AM

Hi all i have a problem with my 2.5 89 yj it idles like a dream but when i give it gas to go it seems like it gets too much fuel and bogs down, i have to press the clutch rev it to clear it up then go. also when driving at normal speed around 2000 rpm holding it there it misses, when i give it gas it bogs at first then takes off. i have changed the TPS, CTS ,ACS, cleaned the TBI , checked the CAT, changed all vac lines, checked the compression, checked fuel pressure, im starting to think its the COMPUTER ,or maybe a short ,anybody with some advice would be greatly appreciated .

yjking · 07-01-2009, 11:21 AM

I forgot to mention that it runs fine when i dont warm it up.

yjking · 07-02-2009, 06:52 PM

what nobody ????

yjking · 07-11-2009, 12:17 PM

so I disconnected my air temp ,coolant temp and oxygen sensor and runs a little better but still bad!!!HELP!!!!

Mike_fx4 · 07-12-2009, 11:29 AM

Sounds like my problem, i have a 87 automatic, while driving about 60 or so just cruising it has a horrible miss you to it and the rpms will just drop and shoot back up and drop and come back up. but idels fine.....i have replaced all kinds of parts on mine, had the carb cleaned and still cant figure out the problem...still misses ? i just dont know

dooder · 07-12-2009, 12:24 PM

old wires, cap and rotor will cause a high load miss. mostly wires though.

07-01-2009, 11:04 AM	#1
yjking Jeeper Join Date: Jun 2009 Posts: 40	Engine misses at speed! Hi all i have a problem with my 2.5 89 yj it idles like a dream but when i give it gas to go it seems like it gets too much fuel and bogs down, i have to press the clutch rev it to clear it up then go. also when driving at normal speed around 2000 rpm holding it there it misses, when i give it gas it bogs at first then takes off. i have changed the TPS, CTS ,ACS, cleaned the TBI , checked the CAT, changed all vac lines, checked the compression, checked fuel pressure, im starting to think its the COMPUTER ,or maybe a short ,anybody with some advice would be greatly appreciated . __________________ mods ive done=borla headers,-mopar cam,-random hi flo cat, -32 bfg's,-arg steering gear,-flexalite fan,-4,56 gears, Jacobs ignition,-short block,-optima battery,2.5 inch pro comp lift,-urethane bushings,-warn rear bumper,i think that's it.

07-01-2009, 11:21 AM	#2
yjking Jeeper Join Date: Jun 2009 Posts: 40	I forgot to mention that it runs fine when i dont warm it up. __________________ mods ive done=borla headers,-mopar cam,-random hi flo cat, -32 bfg's,-arg steering gear,-flexalite fan,-4,56 gears, Jacobs ignition,-short block,-optima battery,2.5 inch pro comp lift,-urethane bushings,-warn rear bumper,i think that's it.

07-02-2009, 06:52 PM	#3
yjking Jeeper Join Date: Jun 2009 Posts: 40	what nobody ???? __________________ mods ive done=borla headers,-mopar cam,-random hi flo cat, -32 bfg's,-arg steering gear,-flexalite fan,-4,56 gears, Jacobs ignition,-short block,-optima battery,2.5 inch pro comp lift,-urethane bushings,-warn rear bumper,i think that's it.

07-11-2009, 12:17 PM	#4
yjking Jeeper Join Date: Jun 2009 Posts: 40	so I disconnected my air temp ,coolant temp and oxygen sensor and runs a little better but still bad!!!HELP!!!! __________________ mods ive done=borla headers,-mopar cam,-random hi flo cat, -32 bfg's,-arg steering gear,-flexalite fan,-4,56 gears, Jacobs ignition,-short block,-optima battery,2.5 inch pro comp lift,-urethane bushings,-warn rear bumper,i think that's it.

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07-12-2009, 11:29 AM	#5
Mike_fx4 Jeeper Join Date: Jul 2009 Posts: 20	Sounds like my problem, i have a 87 automatic, while driving about 60 or so just cruising it has a horrible miss you to it and the rpms will just drop and shoot back up and drop and come back up. but idels fine.....i have replaced all kinds of parts on mine, had the carb cleaned and still cant figure out the problem...still misses ? i just dont know

07-12-2009, 12:24 PM	#6
dooder Jeeper Join Date: Apr 2009 Posts: 538	old wires, cap and rotor will cause a high load miss. mostly wires though.

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