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Topic: Engine cutting out on acceleration (Read 836 times) |
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philgood
Full Member
2.9l 12v Auto (95 M) Ultima Saloon (Aubergine)
 
Posts: 122
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Engine cutting out on acceleration
« on: Oct 29th, 2007, 10:15am » |
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My M reg, 2.9, 12v Auto Ultima has recently developed an engine problem.
After cruising, problem free, for about 60 miles the engine started to cut out / drastic miss fire on acceleration / pulling away from junctions whilst driving around town! I garaged the car for a week without touching it and when I went to reuse it there was no problem but used it again this weekend and within 5 mile it started to cut out on acceleration again but it cleared after about 10 mile and ran normally for over 50 mile. I have previously had a similar fault when the air con was on & never found the fault but can live this fault.
Has anyone else had this problem or any ideas were to start looking?
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Regards
Phil.
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Jonnycab
Senior Member
Former owner of 2.3 Ultima Facelift saloon
Posts: 3900
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Re: Engine cutting out on acceleration
« Reply #1 on: Oct 29th, 2007, 10:47am » |
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Fuel pump relay playing up ? 
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ChrisF
Full Member
All the Granny's now the best 98 2.3 16v Ultima
Posts: 136
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Re: Engine cutting out on acceleration
« Reply #2 on: Oct 30th, 2007, 6:52pm » |
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Do you mean miss fire or back fire
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philgood
Full Member
2.9l 12v Auto (95 M) Ultima Saloon (Aubergine)
Posts: 122
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Re: Engine cutting out on acceleration
« Reply #3 on: Oct 30th, 2007, 7:20pm » |
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Serious misfire / cutting out but still manages to run! I have checked the relay and all seems to be in order. I used the car today with no problems
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Regards
Phil.
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Matt
Senior Member
Manual'd and a 4.0 in the making
Posts: 2816
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Re: Engine cutting out on acceleration
« Reply #4 on: Oct 30th, 2007, 9:14pm » |
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check the plugs/ dissy cap
i had a 12v do this and fould a plug has lost its ceramic insulation 
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FDS2000 Scans - Birmingham
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cossie_al
Full Member
Ex 24v
Posts: 902
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Re: Engine cutting out on acceleration
« Reply #5 on: Oct 30th, 2007, 10:51pm » |
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Could be way of the mark here but I had a bike with symptoms similar to what you describe.
To cut a very long and what turned out to be very expensive story short the fuel tank breather was blocked 
I only discovered the problem by chance when I happened to take my helmet off before refueling to talk to a mate who pulled up at the next pump.
As I removed the filler cap there was a large hissing sound.
As the fuel was being used it was creating a vacuum in the tank and after 40 to 50 miles the vacuum was strong enough to starve the engine.
Before this I had replaced most of the ignition system, checked timing etc and had it to the dealers three times.
Forgot to mention when the bike was missfiring if I stopped at the side of the road for 15 minutes or so it would just dissapeer for another 40 miles or so.
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howiedintheplace
Senior Member
Based near Evesham
Posts: 1194
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Re: Engine cutting out on acceleration
« Reply #6 on: Nov 2nd, 2007, 4:38am » |
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Sounds like a TPS problem.
Disconect it next time it plays up & see if the problem gets better.
If not look at the map sensor.
Also check timming & reset it correctly in service mode.
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Dave
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philgood
Full Member
2.9l 12v Auto (95 M) Ultima Saloon (Aubergine)
Posts: 122
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Re: Engine cutting out on acceleration
« Reply #7 on: Nov 4th, 2007, 7:05pm » |
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Thanks for the advice. I checked the TPS (Throttle Position Sensor) and connector plug and all seemed ok there. I don’t think that my 2.9 12v has a MAP sensor or I couldn’t find one that resembles one anyway.
I Checked the Distributor cap / rotor arm and ended up replacing both.
Went on a 70-mile journey today with no ill affects at all I’m going on a booze cruse Thursday so I’ll see what happens then as long as it doesn’t pack up in France I’ll be ok thanks to AA recovery
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Phil.
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sapte
Junior Member
I'm a YaBB newbie!
Posts: 66
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Re: Engine cutting out on acceleration
« Reply #8 on: Nov 12th, 2007, 3:01pm » |
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You might wanna check the ignition coils, I had the same problem and solved it by replacing the ignition coils
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Snoopy
Administrator
Very old.BAD tempered and missing friends.
Posts: 6278
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Re: Engine cutting out on acceleration
« Reply #9 on: Nov 12th, 2007, 6:18pm » |
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The 12v DOES have a MAP is bolted onto the offside wing near the suspension strut.
Also check ALL the vacum pipes . a loose or broken one CAN cause the syptoms you have described.
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philgood
Full Member
2.9l 12v Auto (95 M) Ultima Saloon (Aubergine)
Posts: 122
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Re: Engine cutting out on acceleration
« Reply #10 on: Nov 12th, 2007, 6:30pm » |
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French trip went ok, 300 mile with no ill affect. It's getting too cold to mess around under the bonnet so i'll have another poke around when it warms up.
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Phil.
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harry.m1byt
Full Member
What's YaBB?
Posts: 792
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Re: Engine cutting out on acceleration
« Reply #11 on: Nov 12th, 2007, 10:01pm » |
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on Nov 4th, 2007, 7:05pm, philgood wrote:Thanks for the advice. I checked the TPS (Throttle Position Sensor) and connector plug and all seemed ok there. I don’t think that my 2.9 12v has a MAP sensor or I couldn’t find one that resembles one anyway.
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Look for a small black plastic cased module with both vaccum pipes and cable entering it, bolted on the wing.
Last time I had a problem similar to the one you describe (not the Scorp), it turned out to be a partially blocked fuel filter. The time before that was a blocked vent on a fuel filler cap (as someone else mentioned). It would run so many miles, then needed a rest - after which it would run fine again.
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August '95 2.9 12v auto Ultima -
Now flashing
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