Citroen ZX 1.4i Pazazz, Map sensor

Boomer · Post by **Boomer** » 12 Mar 2004, 02:59

Could someone please tell me were the map sensor is located, Contacted the dealer, they say it is on the drivers side inner wing, but it isn't. I've also checked round the inlet manifold but nothing.

noz · Post by **noz** » 12 Mar 2004, 03:06

Haven't a clue where it is but I'd start by tracing any piece of tubing joined to any part of the intake manifold or ducting. The MAP sensor will be at the end of it.
cheers
noz

CITMAN · Post by **CITMAN** » 12 Mar 2004, 03:27

The dealer says that its on the inner side wing. It was when the car came out of the factory its towards the front of the engine and has a black cover over it and is near the throttle cable, so in theory you can follow the cable and be able to see as there is a rubber pipe going to the throttle body. But there was a problem with petrol and oil getting into the map sensor itself. So the mod was to move the sensor to the drivers side suspension turret, so that pipe is inclined slightly so that oil and petrol can drain off. You can trace the little rubber pipe from the single point injection unit to the map sensor.

alexx · Post by **alexx** » 12 Mar 2004, 04:57

According to Haynes ('91-'94), there's no MAP sensor in ZX 1.4 with Bosch Monopoint injection (A2.2 or MA 3.0). ECU uses signal from the throttle potentiometer to determine engine load. Later models, not covered in the book I own, may have different fuel injection.

CITMAN · Post by **CITMAN** » 12 Mar 2004, 14:43

The a2.2 doesnt, but the MA3.0 defo does. Because my zx 1.4i with the MA 3.0 has, as it been replaced twice.

alexx · Post by **alexx** » 12 Mar 2004, 15:59

Citman,
well, it turned out several times, that data in Haynes were not always accurate ...
I found another info (www.obd-2.de) - ZX 1.4 from 1996 on can be also fitted with Bosch Motronic MP 7.3 (it's a multi-point injection, I think)
How did you find out that your MAP needs replacement, how did the engine behave? I have a slight problem with my Xantia (Sagem SL 96 injection). When you press the throttle quickly, there's a little delay (about 1/4 of second) in engine response, so this is a bit annoying. There are no other problems (idle is stable, performances ok). Diagnostic device didn't show any errors and all sensors were giving 'normal' readings.
cheers

Boomer · Post by **Boomer** » 12 Mar 2004, 16:57

when i am in slow moving traffic the car misses constantley but only when the car is up to tempreture. When excelerating the car is fine, It also cuts out sometimes when moving of traffic lights, Junctions ect.

Boomer · Post by **Boomer** » 12 Mar 2004, 17:00

Just thought i'd mension it is a single point injection not multi point injection and the engine is a KDY (1360cc).

alexx · Post by **alexx** » 12 Mar 2004, 19:26

According to some spreadsheets I have here from various noname sources, KDY is indeed fitted with Bosch A2.2. So, if info about A2.2 in Haynes is correct, there's no MAP sensor. CPU type should be stamped somewhere on the unit. Also, if I remembered correctly, this type of fuel injection doesn't control ignition, so there must be ordinary distributor on the engine, unlike MA3.0 (KDX engine).

Boomer · Post by **Boomer** » 12 Mar 2004, 21:01

THANKS FOR THE INFO ALEXX, bUT AS U CAN SEE FROM THE PHOTOS IT IS A DISTRIBUTERLESS IGNITION.HTTP://WWW.MTBDERBYSHIRE.CO.UK

Sl4yer · Post by **Sl4yer** » 12 Mar 2004, 21:58

Thats a KDX engine.
As far as I'm concerned, there is no MAP sensor on it. I'm happy to go with Haynes on this one!

CITMAN · Post by **CITMAN** » 12 Mar 2004, 23:57

I can guarantee that the KDX has a MAP sensor. When mine went it misfired as it was overfuelling, sooting up the plugs. The second time it was same but ten times worse, in the middle of wales, miles from civilisation, juddering, misfiring, cutting out, no power, which cleared for a bit on turning the engine off. The car did get us home though (150+ miles).
A citroen specialist put it on his diagnostic machine, and it said the map sensor was recorded as the fault. Since it was replaced no further problems.
When was you pzazz last serviced, it might be dodge leads and plugs. Failing that it needs to go on a diagnostic machine to sort it out.

alexx · Post by **alexx** » 13 Mar 2004, 14:53

Boomer, nice pictures.
Well, I didn't own any ZX, but some additional info here may be of some help. Your engine is defo different than the one in Haynes, which is clearly KDY (ID plate is visible on one picture):
- your is distributorless, while that one in Haynes has distributor and different ignition coil, with one output (like in BX I owned before)
- your hasn't ignition retarder, which should be situated behind the battery
- throttle housing is a bit different
So, fuel injection in your car obviously isn't A2.2, but probably MA3.0
Citman, did you actually check, that you have MA3.0. According to spreadsheets I have, KDX engine can be also fitted with Magneti Marelli G6 injection, which does have MAP.
Picture of Magneti Marelli MAP, along with datasheet, can be found here: http://www.magneti-marelli.com/sensors-pressure.asp (I think it's PRT 03/04)

Stuart McB · Post by **Stuart McB** » 13 Mar 2004, 19:25

Map sensor. About the size of a small box of matches, quite thin with plastic tube comming from the bottom and a multi plug on top looks as it may be made from half plastic and half metal and black in colour. Bolted to the inside if the drivers wing by the power steering fluid. Held to the wing by a 6mm bolt (10mm head). remove plug and tube undo bolt and its off. Easy fix as expensive to buy. place on a radiator all night with paper towle under where the tube should go let old oil residue dripp out then re fitt, the car should run better. If you need to by one get the yellow pages out and speak to a BOCSH specialist as I think if memory serves me well £50 from Bosch or £125 +vat from Citroen. The stalling is a classic sympton of MAP sensor on these smaller engines. Took me about 3 months to figure it out after numerous trips back to the dealer with my Xsara VTR 1.6.

Boomer · Post by **Boomer** » 14 Mar 2004, 15:54

Yes alexx looked in haynes and it seems like it is a MA3.0 which doesn't look like it has a MAP SENSOR. Any sugestions as to what else it could be. Cheers.