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 ?

vacuum leak

D

Hi Mate - where shall I look for that ?

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 ?

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.

Clean the stepper motor - the air idle valve?

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
Tom

I have a new Fuel filter - fitting tonight

Stepper motor is new - only used decent fuel so hopefully OK

Has it got the standard air filter on it?

D

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

Mine did this i changed lamba sensor sorted mine id done the same map sensor coils leads plugs fuel filter

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 :bang:

DRSIK said:

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 :bang:

Click to expand...

I did the same new lamba and its sorted mine out

its plausible... the lambda isn't used until car warms up a bit.

blu73 said:

its plausible... the lambda isn't used until car warms up a bit.

Click to expand...

Alright blu u got a cinq again mate

nope, not for a long time now.

LAMDA on order

Update - been busy with other things

Fitted new LAMDA sensor - no change

Car still gutless cold (feels like it is overfueling and firing on 3 cylinders) until it warms up then it gets smoother (still not quite 100%).

The tickover is 100% ALL the time though - even when cold.

It is only when I press the throttle it "bogs down" . As I lift off it goes back to normal briefly (then the power drops because I am no longer pressing the throttle). Sometimes if I am really gentle with the throttle I can get a smooth power delivery.

Also it is much smoother higher up the rev range.

Any ideas ??

wow this is ongoing isnt it..

i think from memory you have changed map sensor and fuel filter.. I suggest you whip the throttle body off and give it a damn good clean, particularly the idle control valve.

After that I'd say just check the timing real quickly, i assume access is really good for this in the mischief machine... will idle fine one or 2 teeth out, under load is a different kettle of fish though.

So after that i'd be diggin into the ignition system, check all the plugs cause this could just be breaking down ceramic on one plug even. Check leads visually and then again in dark looking for blue sparks etc. Tbh if you dont find any issues i'd be inclined to change the leads anyway as they as so cheap. You can clean and regap the plugs if they appear fine.

Then I'd start thinking about replacing the actual coils.

Keep us posted buddy

I have new fleabay coilpacks and brand new magnecor leads and the plug were changed last service.

Last week it ran brilliantly for a day ( just to wind me up) - then it went back to misbehaving:bang: