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Old 10-07-2017   #1
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Stuttering loss of power on acceleration

Hi Folks

Having a bit of fun with the mischief machine.

It has started to "bog down" when I try to accelerate. (loss of power - that sort of returns when the foot is off the accelerator....also tick over is lovely and smooth)

I have already replaced the crank sensor recently and also no "injector light" is coming on.

THis meant I suspected the MAP sensor so I got one from fleabay and now the problem is even worse !!!

I will check over the next couple of days if my fitting skills have deserted me but in the meantime does anyone have any ideas ?
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Old 10-07-2017   #2
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Re: Stuttering loss of power on acceleration

vacuum leak

D
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Old 11-07-2017   #3
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Re: Stuttering loss of power on acceleration

Hi Mate - where shall I look for that ?
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Old 17-07-2017   #4
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Re: Stuttering loss of power on acceleration

Fitted new Map sensor and pipe to throttle body.

Checked Vacuum take of to brakes

No change still behaves like it has a choke (nice tickover - "bogs down" when throttle is pressed quickly)

Unplugged MAP sensor same symptoms - only difference is the engine (injector light) comes on.

Any ideas ?
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Old 24-07-2017   #5
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Re: Stuttering loss of power on acceleration

Put back on the old sensor - a bit better than the new one!!!!

Also replaced all tubing from carb to MAP with OEM parts.

Still not great - any more thoughts.
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Old 24-07-2017   #6
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Re: Stuttering loss of power on acceleration

Clean the stepper motor - the air idle valve?
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Old 24-07-2017   #7
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Lightbulb Re: Stuttering loss of power on acceleration

MAY or MAY NOT be related, but sounds similar as to how my wifes started, now, hopefully solved!! We had a build up of crap in the bottom half of the fuel filter, having replaced this seems to have solved our issue touch wood and fingers corssed etc! may be worth even having a look?
cheers
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Old 25-07-2017   #8
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Re: Stuttering loss of power on acceleration

I have a new Fuel filter - fitting tonight

Stepper motor is new - only used decent fuel so hopefully OK
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Old 25-07-2017   #9
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Re: Stuttering loss of power on acceleration

Has it got the standard air filter on it?

D
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Old 26-07-2017   #10
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hmmmm hopefully you will get to the bottom of it!! I have soent nesr on 500 on sensors and what not until the last thibg (fuel filter) lol
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Old 27-07-2017   #11
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Re: Stuttering loss of power on acceleration

Mine did this i changed lamba sensor sorted mine id done the same map sensor coils leads plugs fuel filter
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Old 15-08-2017   #12
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Re: Stuttering loss of power on acceleration

I have done the MAp sensor and Fuel filter.

Still has lovely tick over and drives well until hot.

Then I still get some "flatspots" and lag that I did not get before.

There maybe a slight blow at the exhaust manifold - could this or LAMDA be the problem
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Old 16-08-2017   #13
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Re: Stuttering loss of power on acceleration

Quote Originally Posted by DRSIK View Post
I have done the MAp sensor and Fuel filter.

Still has lovely tick over and drives well until hot.

Then I still get some "flatspots" and lag that I did not get before.

There maybe a slight blow at the exhaust manifold - could this or LAMDA be the problem
I did the same new lamba and its sorted mine out
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Old 16-08-2017   #14
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Re: Stuttering loss of power on acceleration

its plausible... the lambda isn't used until car warms up a bit.
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Old 16-08-2017   #15
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Re: Stuttering loss of power on acceleration

Quote Originally Posted by blu73 View Post
its plausible... the lambda isn't used until car warms up a bit.
Alright blu u got a cinq again mate
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