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Topic: sudden loss of power (Read 696 times) |
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shaun
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shaun
 
Posts: 492
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sudden loss of power
« on: May 16th, 2008, 12:08pm » |
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hi all driving my car the other day i had only done 18 miles then i noticed it wouldnt kick down properley when i put my foot down hard ,it was hesatating,
went on a bit further ,it got worse i eased off the power then put my foot down then it cut out ,pannic ,,i was only dowing 25mph but on a ring road island knocked it into N re,started it no probs ,then back into D away we go .on my way back after about 20miles going round the motoway island i put my foot down no power flat as a f..t (it felt like it would not want to go) eased off the accelator then put it back down fine. kick down fine,help please ,,,,, 
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Scorpio_Mike
Senior Member
Jeep Grand Cherokee 3.0 V6 & 2.8 Sierra XR4i 4x4
Posts: 2354
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Re: sudden loss of power
« Reply #1 on: May 16th, 2008, 1:19pm » |
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Check the MAF is clean.
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Star sign is Scorpio !
Sierra XR4i's are great...especially when fitted with 4WD 
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Snoopy
Administrator
Very old.BAD tempered and missing friends.
Posts: 6278
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Re: sudden loss of power
« Reply #2 on: May 16th, 2008, 1:48pm » |
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Could be that the cat has broken up and blocked the exhaust!
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Tons_of_fun
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Mmmm...Xena !
Posts: 978
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Re: sudden loss of power
« Reply #3 on: May 16th, 2008, 4:52pm » |
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Fuel filter ? ? .Just out of curiosity when it happens does the winter setting mode button light up on your gearbox ? ?.My old 2.0ltr used to do something similar & everytime it went flat ,the gearbox had switched itself over to winter mode .Never got to the bottom of that one as it was nicked shortly afterwards 
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Lord...Sometimes im not that bright
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TiberiuS
Senior Member
Ex. 1996 2.3 Ultima - RIP P789 KHJ
Posts: 2257
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Re: sudden loss of power
« Reply #4 on: May 16th, 2008, 6:20pm » |
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Sounds like a fuel issue, could be the little diaphragm in the FPR not opening properly when the revs go up.
Or fuel filter like Tonnes mentioned 
Pumps can sometimes drop speed when the commutator and bearings get worn but they normally die completely and one day it just won't start, been there 
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Kjetil S
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2001 BMW 520iat
Posts: 1419
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Re: sudden loss of power
« Reply #5 on: May 17th, 2008, 2:49am » |
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What engine is it? A broken coil pack can seriously cut down on available engine torque, but that problem is afaik usually on the 16v's.
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Jonnycab
Senior Member
Former owner of 2.3 Ultima Facelift saloon
Posts: 3900
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Re: sudden loss of power
« Reply #6 on: May 17th, 2008, 2:55am » |
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Have you checked the fuel pump relay ?......
Also check that the small black lead that goes on the battery negative is on nice & tight....this can play havoc if it's slightly loose
HTH
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shaun
Full Member
shaun
Posts: 492
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Re: sudden loss of power
« Reply #7 on: May 17th, 2008, 10:55am » |
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gowing out side to change cat, fule filter ,fpr , fule pump relay, coil packs ,and check battery leads ,but before all that obd2 reading on laptop ,thanks will keep you informed.. 
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shaun
Full Member
shaun
Posts: 492
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Re: sudden loss of power
« Reply #8 on: May 17th, 2008, 11:04am » |
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 code po102 scorpio mike got it right im gowing to change that too
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Tons_of_fun
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Mmmm...Xena !
Posts: 978
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Re: sudden loss of power
« Reply #9 on: May 17th, 2008, 11:05am » |
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Hopr you get it sorted soon m8
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shaun
Full Member
shaun
Posts: 492
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Re: sudden loss of power
« Reply #10 on: May 17th, 2008, 9:59pm » |
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think its done the job changed ,maf, fule rale with fpr,fule filter ,(even tho it was only 6 mounths old)air filter(only 3 mounths old) done 20 miles no probs still gowing to change coil packs and fule pump relay and cat next week all in the boot just in case fingers x 
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