cx won't start

jsp · Unread post by **jsp** » 07 Mar 2016, 11:50

Hi, I have here my cx 1984 GTI turbo and last few days it won't start anymore. It has run fine last few days.

Ignition modules checked

Fuel checked

Injectors ??

Crankshaft sensor?

ecu ok

Unread post by **aerodynamica** » 07 Mar 2016, 22:24

Crankshaft sensor is the most notorious cause, I can't recall if there is one sensor or two for an '84 Turbo 1. If it is missfiring it might be one of the two coil trigger wires from the ECU -I'd check and clean those first. My go-to guy for this stuff in the past was a chap called Fil Van Delft based near Birmingham but not sure he's on here any more? Another thing to check is the 'big blue' relay for the fuel pump. I've also heard stories of CX ignition switch failing - sometimes aggravated by having too many keys pulling on the key ring. Is the ECU getting power?

jsp · Unread post by **jsp** » 10 Mar 2016, 22:03

are these still fs or nfp??

yes ecu getting power.

jsp · Unread post by **jsp** » 20 Mar 2016, 21:30

still not starting.........

Deanxm · Unread post by **Deanxm** » 20 Mar 2016, 22:33

Have you checked for fuel pressure at the rail and a spark? kind of need to know which one is absent to have a clue but if there is no engine management light while cranking and one day it worked and the next it did not then i would be looking at the crank sensor as suggested above as a starter.

I take it these are mechanical ignition with EFI? if it is the failed crank sensor would likely stop fueling and you will have a spark.

D

jsp · Unread post by **jsp** » 20 Mar 2016, 23:21

are these crank sensors still available?

Deanxm · Unread post by **Deanxm** » 20 Mar 2016, 23:39

should be http://www.ebay.co.uk/itm/Crank-Shaft-S ... Jx6ZID63WA

D

jsp · Unread post by **jsp** » 21 Mar 2016, 07:55

That is the wrong plug for this car. I have a square plug.

Deanxm · Unread post by **Deanxm** » 21 Mar 2016, 14:34

what you have a length of cable coming from the sensor with a three pin rectangular plug or a square plug striaght onto the srnsor?

It will still be available, you will probably find it was fitted to a whole raft of Citroens of the time, the one i linked may be a generic photo too so its worth checking.

D

jsp · Unread post by **jsp** » 22 Mar 2016, 02:03

two pin rectangular plug

CGATCX25GTITURBO · Unread post by **CGATCX25GTITURBO** » 25 Mar 2016, 11:10

jsp wrote:two pin rectangular plug

I have a brand new sensor

I have few used too. not parting with all as I'm keeping the OE system on the car but currently it runs using KDFI EMS.

If your'e still looking for one you can send me a PM.

jsp · Unread post by **jsp** » 04 Apr 2016, 11:05

yes still wont start I took off my other cx the crankshaftssensor and still nothing........

Its getting spark and fuel.

CGATCX25GTITURBO · Unread post by **CGATCX25GTITURBO** » 04 Apr 2016, 20:17

okay, has the inlet hose come off the turbo? the rubber elbow is what I'm tallking about. It is possible air isn't being drawn past the air flow meter and the fuel will be cut off. could just be fould psark plugs not sparking under compression.

jsp · Unread post by **jsp** » 26 May 2016, 00:16

still nothing. All hoses ok.crankshaft sensor working. ECU?

jsp · Unread post by **jsp** » 07 Jun 2016, 22:14

Still nothing ahhh h someone help me?

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