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-   -   Given up!! (https://www.the75andztclub.co.uk/forum/showthread.php?t=319663)

simondhopkins 18th June 2022 11:49

Given up!!
 
Having replaced both ubp and itp, I have constantly had the throttle cut to no more than 2000 revs.

Nothing is showing on toaf, leakback test is all good. No signs of fuel leaking from the HP pump, no smell of diesel in the oil.

Oil pressure light comes on, ecu is clean and I have also stripped the ECU to check for corrosion and its clean.

At my wits end with the damn thing now. It don't matter how much fuel is in the car either.

Box had a fluid change, no difference, 2/4 solenoid no difference.

Think its time the scrap man came and took the blasted thing away. :(

Might have to go back to a mondeo. Never had a problem with the mk1/2 or 3 I had except they weren't as nice to drive as a 75.

JefferiesFarnol 18th June 2022 12:38

Quote:

Originally Posted by simondhopkins (Post 2936054)
Might have to go back to a mondeo.


That's the saddest thing I've ever heard :(

Bogbrush82 18th June 2022 13:45

Does the 75 have a limp mode? Could be the 02 sensor?

vitesse 18th June 2022 13:58

Quote:

Originally Posted by Bogbrush82 (Post 2936067)
Does the 75 have a limp mode? Could be the 02 sensor?

The autobox certainly has but then you generally get the error EP. Even though the EMU appears 100% dry they do fail.

I'd suggest trying to nurse the car to someone knowledgeable with a T4, I don't know how far the OP is from BigRuss. My daughter had a strange fault on her V6 which we thought was relay related. Nothing on Toaf but my T4 identified a cam sensor error, swopped and all good. Strange but happy result.

Regards

Arctic 18th June 2022 14:36

Quote:

Quote:

Originally Posted by simondhopkins (Post 2936054)
Having replaced both ubp and itp, I have constantly had the throttle cut to no more than 2000 revs.

Nothing is showing on toaf, leakback test is all good. No signs of fuel leaking from the HP pump, no smell of diesel in the oil.

Oil pressure light comes on, ecu is clean and I have also stripped the ECU to check for corrosion and its clean.

At my wits end with the damn thing now. It don't matter how much fuel is in the car either.

Box had a fluid change, no difference, 2/4 solenoid no difference.

Think its time the scrap man came and took the blasted thing away. :(

Might have to go back to a mondeo. Never had a problem with the mk1/2 or 3 I had except they weren't as nice to drive as a 75.


Hi Simon.
Try unplugging the MAF sensor see if it changes anything, also do you have an FBH on your car?

raykay 18th June 2022 21:41

I have had a similar problem - it was a faulty fuel rail pressure sensor.

Ched 18th June 2022 23:29

Sensor on the end of the hp pump

genpk 18th June 2022 23:38

had similar thing happen to me on a kv6 2.5 engine.
Turned out to be a faulty o2 sensor, the first one before the cat converter.
Easy to check, just unplug it and the ecu goes to a default setting and runs fine.
The plug is right next to the aircon pipes going down the fire wall,
At least its easy to eliminate if it not that.

Arctic 19th June 2022 00:03

[QUOTE]
Quote:

Originally Posted by Ched (Post 2936119)
Sensor on the end of the hp pump[/QUOTE

]

Hi David.
You are referring to the regulator, yes sometimes the O-rings can fail, but you usually get a none starting problem with that.
https://i.imgur.com/1tkRUy6l.jpg1

https://i.imgur.com/jzQXD1hl.jpg2

https://i.imgur.com/hNMBxx6l.jpg3

https://i.imgur.com/E0N5cMkl.jpg4

Ched 19th June 2022 20:12

First zt tourer I had had a fuelling prob, previous owner had replaced everything except that sensor, it was over pressurising the system and the car cut out but restarted straight away, a t4 session identified the culprit and a good used replacement cured it.
The other thing could be the throttle pedal is worn out, best thing is the Op get it on a t4.


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