Check the map sensor pipe, If blocked it can give that kind of response. The ECU doesn't see the change in pressure accurately.

Cheers

D

Grumpy old git going fast downhill rather than downhill fast!!

I'm sure you'll be able to find a scrappers with the original full airbox set up for about a tenner. Could try it for nothing. if that is your problem, get a GSR!

Sie
Black 96P Cinq Sporting
OMP Strut Brace, GSR F1i Induction, Pioneer ICE

where abouts is the map sensor pipe? :I

Abarth Cinq Sporting in Broom Yellow, The best colour

Check your HT leads too.

Red Cinq Sporting Abarth 1242

K&N do cleaning and reoiling fluid but i used to go to the garage and use the airline to blow the crap off,just take it of the intake and blow it clear from the inside and see if that helps

The Fiat Cinquecento
Fun While It Runs

My mate had a 57i kit on his polo for about a year. The cold air was dragging more fuel through the engine than it needed. Instead of burning in the engine it burnt up inside the CAT. Result a hollow CAT and plenty of backfiring. Just a thought.

reckon the ECU's just adjusting? or would that be instant?

Abarth Cinq Sporting in Broom Yellow, The best colour

Map sensor pipe runs from the back of the throttle body to the map sensor, which is on top of the nearside strut top

Cheers

D

Grumpy old git going fast downhill rather than downhill fast!!

heh just looked and has been sealed off.

would ecu adjust straight away or take few miles to adjust?

Abarth Cinq Sporting in Broom Yellow, The best colour

Neither. The ECU will require the map sensor to be connected. It tells the ECU when the pressure in the manifold changes. The system will work without it, as yous does, but the ECU will never learn to do without it, so either stick with the jerkiness, or get it attached.

Cheers

D

Grumpy old git going fast downhill rather than downhill fast!!

Originally posted by rallycinq
Neither. The ECU will require the map sensor to be connected. It tells the ECU when the pressure in the manifold changes. The system will work without it, as yous does, but the ECU will never learn to do without it, so either stick with the jerkiness, or get it attached.

Click to expand...

It will almost certainly be the MAP sensor if this is not connected.

Another possible problem might be the Lambda sensor. Amanda's Cinq had exactly the symptoms you describe (hesitates for a second, then picks up all of a sudden, most gears - usually in the lower rev range as you accelerate)

I swapped the Lambda sensor over from a 'spare' Cinq I have access to and the problem was cured. Might be worth checking this out as well.

We have luckily managed to keep the sensor off the donor car, so it has run fine since.

MAP sensor is what I would check first, but Lambda is the next option I would investigate....

Regards,

Bruce.

where abouts is the Lambda sensor?

i have a "spare" cinq at the mo too, easy to swap them over?

just looked again and the first wire is connected, my bad :I

Abarth Cinq Sporting in Broom Yellow, The best colour

Lambda sensor is on the front pipe of the exhaust, screwed in the side.

Pete.
1242cc cinq,turbo cinq,Cinqs&Seis Yahoo group,Clubcento

anyway to test if it works or not? or is it more of a garage job?

Abarth Cinq Sporting in Broom Yellow, The best colour

just swap it over


Cinq Sporting - and yes, its broom yellow!

reason i ask is because i think the one on 2nd cinq is dead too

Abarth Cinq Sporting in Broom Yellow, The best colour