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Discussion Starter #1
Hi

My GT 2.0 jts decided to stop & now wont start.

On Wednesday of this week i had to have the car recovered because of a corroded shock absorber & so it had spent most of the week with the back end jacked in the air. On Saturday work was completed and car started and ran with no problems other than it needed a jump start. i went for a run on Saturday evening & it cut out & wouldn't re-start got the Green Flag recovery out & he managed to re-start it but only by spraying ethanol (brake cleaner) into the air intake. Anyway it ran for about 3-4 mins then cut out again & once again it was recovered home. The mechanic seem to think it was a fuel pump issue but you can hear the pump prime when you turn on the ignition, is it just possible that with the car being nose down for 3 days that it's just crap from the fuel tank in the fuel line or the filter. Bit of a ramble I'm afraid but any help appreciated.
Cheers
Ian
 

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Crank sensor. They fail when the car is warm which tricks the ECU into cutting the fuel, hence the car won't start without spraying some sort of hydrocarbon into the intake. Had the same thing on my GTV. Pretty easy fix and shouldn't cost an arm and a leg to get it replaced.
 

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Discussion Starter #3
Hi
Thanks for the reply I take it that as it's been sat over night & is now cold it should start & then cut out when it reaches running temp.
Cheers
Ian
 

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Yea that's usually what happens when the crank sensor craps itself.
 

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Thanks for the reply I take it that as it's been sat over night & is now cold it should start & then cut out when it reaches running temp.
That would be classic crank sensor failure if it starts again once cooled after half an hour.

But there have been quite a few cases with JTS having fuel pump failure with similar symptoms. Starting on Easystart (or similar) means there was a spark but not Petrol, which would move to fuel pump rather than crank sensor.
 

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Discussion Starter #6
Hi
I've just tried it again & still no joy, i have a plug in obd reader & that initially gave a low fuel rail pressure error but that cleared it's self but now shows a P1670 pending undefined code. So that's about me with my limited knowledge stuffed.
 

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A forum search finds plenty of P1670 threads. Seems to be generally associated with fuel pressure.
 

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Discussion Starter #8
Hi Guys
Well it would appear that it is the crank sensor that's faulty, managed to get the car started last night and all seemed well warmed up for about 10 mins so decided to take it for a run & about 1/4 mile later it stopped again.
Anyway question is, is it much of a job to change the sensor.
Cheers
Ian
 

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Discussion Starter #9
Well that was a disappointment new crank sensor fitted what a [email protected]£s%"*d of a job that was, car started with a bit of help from the easy start can (yipeee sorted) ran for 3 mins temp got to about 50 degs then stopped & wont start.
Next question is the fuel system pressurised & is it ok to disconnect the fuel pipe at the union next the fuel tank to make sure that the pump is working.
 

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Well that was a disappointment new crank sensor fitted what a [email protected]£s%"*d of a job that was, car started with a bit of help from the easy start can (yipeee sorted) ran for 3 mins temp got to about 50 degs then stopped & wont start.
Next question is the fuel system pressurised & is it ok to disconnect the fuel pipe at the union next the fuel tank to make sure that the pump is working.
Several posts above and previous threads were pointing you towards fuel pump.
Having to use easystart always pointed to a fuel problem rather than ignition.
The system is run up to pressure when you turn the ignition on.
Pressure after the high pressure pump on the camshaft is obviously extremely high.
 

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Discussion Starter #11
Hi just an update on this, managed to get it to the local garage i use & they connected to their diagnostics & it was running for about 5 mins then cut out "as if it had just been turned off" mechanics words & the only fault that came up was unable to connect to cam sensor so they ordered a new cam sensor to check readings between old & new one & sure enough readings were different so they think it is this. Well to change the cam sensor it requires the cam belt to come off & when the belt comes off they prefer to change it & also the water pump I must admit that i don't know when this was last done so it probably needed doing but still it's a cost i could do without. Upshot is that at the moment it's in the workshop having the cam sensor done with no guaranty that this is the problem so will just have to wait & see.
 

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I thought cam sensor stopped engine. Crank sensor tells ecu engine timing but cam sensor say which plug to fire. Cam timing can be quite a bit out and car will still run but no signal means ECU doesn't know which cylinder is on compression stroke.

If belts are coming off and you don't have any history of previous change then it may as well be done now.
 

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A cam sensor fault usually just puts it into limp mode, I can't recall a previous case of a non runner because of a failed one.
 

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A cam sensor fault usually just puts it into limp mode, I can't recall a previous case of a non runner because of a failed one.
Sounds familiar, with a limit of about 3000RPM.

Still runs, but may take longer to start.

This one still sounds like a fuel pump problem.
 
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Discussion Starter #17
Hi
An update on this, it's now been in the garage for 5 1/2 weeks & no further forward other than me being vastly out of pocket.
Cam sensor, cam belt & all the other bits that go with a belt change were changed (sensor was faulty i'm assured)
Still didn't work.
The inlet manifold had a crack in it that was changed (thank god for ebay) £1200 dealer £29 ebay
Still no go
Next was the high pressure fuel pump i was told it's not putting out enough pressure managed to get one off ebay & duly fitted that appears to be worse than the original one.
So garage (independent Alfa) seem to be stumped.

It's looking like a can of petrol & a match at the moment unless anyone has any more ideas..
 

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Hi
An update on this, it's now been in the garage for 5 1/2 weeks & no further forward other than me being vastly out of pocket.
Cam sensor, cam belt & all the other bits that go with a belt change were changed (sensor was faulty i'm assured)
Still didn't work.
The inlet manifold had a crack in it that was changed (thank god for ebay) £1200 dealer £29 ebay
Still no go
Next was the high pressure fuel pump i was told it's not putting out enough pressure managed to get one off ebay & duly fitted that appears to be worse than the original one.
So garage (independent Alfa) seem to be stumped.

It's looking like a can of petrol & a match at the moment unless anyone has any more ideas..
:banghead:
Has anyone looked at or replaced the fuel pump in the tank yet.......?
 

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Discussion Starter #19 (Edited)
Hi David
They have told me that the tank pump is delivering fuel to the high pressure pump & that's not putting out as much pressure as it should to activated the injectors that's really as much as i can say whether that's right or not i don't know. It just seems to be lurching from one thing to another & all i know is that i dread how much it's going to cost.
Could you bypass the tank pump just by feeding fuel directly (say by gravity) into the high pressure pump & would that work.
 

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