Ghibli Starts but Stalls

alpa

Junior Member
Messages
86
Morning,

I taxed it on Saturday and thought i would take it out, but it wasn't to be.

Car started fine, revved smoothly but when you took your foot of the accelerator it just stalled.

Before getting it out the garage again, any pointers of things to look at ?

thanks
I realized I understood the problem upside down.
If the engine dies when you release the accelerator then:
  • not enough air "leak": idle valve does not open AND the air bypass not open enough (which means any air leak will prevent from stalling)
  • throttle position sensor does not detect the "idle" position (means pedal released)
  • could be a bad temperature sensor: air or water
 

del mar 2

Junior Member
Messages
81
thank you for suggestions, but measuring values is a little beyond my skill level.

Fuel Pressure regulator is also worth looking at to so check that.

ICV and BOV have arrived so will fit this evening to see if it makes any difference, the car runs so with a bit of clutch slipping i could get it to a garage.


thanks
 

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del mar 2

Junior Member
Messages
81
I fitted the above and it starts and runs !!

As in a rush i just pushed the ICV into the hole without the retaining ring - there was a loud bang as it shot out of the manifold !!!

The gaskets from McGraths havent turned up yet so the "y" piece was leaking and hissing.

It idled at about 1200 and the cel was on, but that is a job for another day.
 

del mar 2

Junior Member
Messages
81
I cleaned it and put it through the dish washer. I bought the throttle body and y piece gaskets during the week, i had some shoe lace gasket left, and i thought a set of manifold gaskets but i was wrong. Will have to order on monday.

One of the air temp sensors in the back of the manifold snapped, before it was even close to being tight.

Eurospares list them as £58, plus vat and delivery so best part of £100 - they must use envelopes coated in gold leaf !!

They do appear to be very similar to Ford Cosworth ones, lots of magneti marelli parts do seem to be used on both cars.
Ford Cosworth YB ACT ATS04 ACT NTK Air Temp Temperature Sensor | eBay

They are only up the road from me so will take it up on monday and see if they are the same.
 

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del mar 2

Junior Member
Messages
81
We are getting there.

New air temp sensors fitted.

Went to Wickes yesterday was idling high circa 2000 revs, drove around for 10 mins and suddenly we were idling at 900 revs pulling smoothly, new bovs gave me full boost again !!

Eventually got to Wickes and we were back to 2000 revs. The throttle doesn't appear to know where it is, you push the pedal down and nothing nothing then full acceleration. I was upto 4000 revs to pull out of a busy junction. A bit like the 3200 when that fails.

Limped up to the garage i use, he is a Ford man and the ignition set up is very similar to a Cosworth.

Tested the exhaust gases and the readings were as expected so O2 sensors are ok. Even whilst in the garage being tested the car would go from a steady 900revs up to 2000 for no reason.

He recommended changing the water temp sensors as they arent the best. We will then look at setting up the TPS correctly, smoke testing it and reading the codes generated by the CEL. He said he had loads of old diagnostic tools from 20 years ago and he should have one that fits.

Things to look at / change.
The absolute pressure sensors are available and not very expensive, they appear to be the same as a ford escort.
The TPS is not, it is a Weber PF10 and they no longer make them, Webcon didnt appear to have a replacement...

Will report back
 

Oneball

Member
Messages
8,751
You should be able to test the TPS by measuring it’s voltage output as you move the pedal. It should be linear. If it isn’t and jumps around then that could be your problem.
 

del mar 2

Junior Member
Messages
81
Afternoon,
Will put that on the list of jobs for him to do !!

o2 sensors.
Eurospares list them for a very reasonable £832 plus vat plus delivery

Speaking to Ross at meridian modena he said they have been out of stock for 10 years but they have used a sensor from a landrover discovery 1995 V8 and you swap the connectors. He had the code LB1105, which does cross reference to Ghibli 2/ Shamal Rover 800, TVR chimera and a couple of Astons.
Found a pair of new NTK ones on ebay for £217 each.

The sensors are 20 old years old now it wont hurt to change them.

thanks
 

del mar 2

Junior Member
Messages
81
just has this from NTK

Thank you for your enquiry.

This item is no longer manufactured and has no replacement.

I apologise for any inconvenience.

Kind regards,


Thank you for your help......