Urgent (Desperate) help needed.
Discussion
Hi all...
having a dilema with the Chim!!!
The car is drinking fuel faster than an convention of alcoholics drinking beer at brewery!!! £50 and i got about 60 miles and that is not a joke!!!!
There is strong smell of petrol comming from the exhaust when it is running and the emmisions are at 6% instead of 1%.
When i am driving along the car feels very spluttery and seems as though it is going to stall.
The fuel pump is making a constant whirring as well similar to when you first turn the ignition on and the pump primes...can this be sticking and over-fuelling the engine???
I have replaced the lambda censors, dizzy cap and arm, plugs leads temp sensors and am now stuck...!!!
Any help would be much appreciated as it is a gorgeous day and chim should be out scaring sunday drivers...!!!
having a dilema with the Chim!!!
The car is drinking fuel faster than an convention of alcoholics drinking beer at brewery!!! £50 and i got about 60 miles and that is not a joke!!!!
There is strong smell of petrol comming from the exhaust when it is running and the emmisions are at 6% instead of 1%.
When i am driving along the car feels very spluttery and seems as though it is going to stall.
The fuel pump is making a constant whirring as well similar to when you first turn the ignition on and the pump primes...can this be sticking and over-fuelling the engine???
I have replaced the lambda censors, dizzy cap and arm, plugs leads temp sensors and am now stuck...!!!
Any help would be much appreciated as it is a gorgeous day and chim should be out scaring sunday drivers...!!!
If you're losing it that quickly then I'd suspect you have a leak between the fuel pump and the injection system. (hope it's not somewhere too hot, but I'd be inclined to track it down before driving it further..usual disclaimers etc etc...There's no way it's due to over-fuelling, although there's something outakilta with the set-up with those emissions. So only two probs to sort before it get's dark!
i have been under the car with the engine running and looked along the full length of the fuel pipe and there is definately no leak...had a look inside the passenger footwell as well and there is no leak there....the new plugs have also sooted up very bad...after apprx 50 miles.
Its definately over-fuelling!!!
Its definately over-fuelling!!!
A long shot...and I may be completely wrong, but it's not going to take long to eliminate - check / clean stepper motor and it's possibly worth resetting the ECU by disconnecting the battery for a minute (have the alarm blipper nearby to silence the thing if it goes off when you reconnect the battery).
could be a stuck injector...
the stepper motor is spotless...made sure that was clean as well!!!
Might just have to bite the bullet and take it to a garage!!!
Have just been having a poke around and found that one of the hoses to the carbon can was off...going for a spin to see what difference that has made!!!
the stepper motor is spotless...made sure that was clean as well!!!
Might just have to bite the bullet and take it to a garage!!!
Have just been having a poke around and found that one of the hoses to the carbon can was off...going for a spin to see what difference that has made!!!
OK, so it's not a leak! You said you changed the temp sensors so if it is fueling too rich then other potential culprits are air-flow limitation or a defective air flow sensor. There are probably others but I've reached the edge of my knowledge.
Did the engine's thirst for fuel just develop or has it built up gradually?
If there's that much fuel squirting into the air stream entering the cylinders and emerging unburnt past the exhaust valves then the cat will probably be cooked/clogged.
Did the engine's thirst for fuel just develop or has it built up gradually?
If there's that much fuel squirting into the air stream entering the cylinders and emerging unburnt past the exhaust valves then the cat will probably be cooked/clogged.
cheers hut for mentioning the cat!!! 
I have told the enemy that parts for these cars are cheap and i was thinking, if there is this much fuel going in, the cat has probably suffered.
It used to be quite good on fuel...22 - 25 mpg but i am not getting anywhere near that...even when taking it easy....the thing that has got me baffled is the fuel pump. i can hear it when driving and i never used to be able to (sounds as though it is constantly priming) and the car does not tick over at all now!!!
I have tried resetting the ecu and have tested every sensor in the bible...they all seem ok.
Sorry POD just read what you had put re fuel pump should make a noise....and it has got a recon airflow meter from Douglas Valley parts.....brought that a week ago!!!
>> Edited by andy-w on Sunday 2nd October 17:29
I have told the enemy that parts for these cars are cheap and i was thinking, if there is this much fuel going in, the cat has probably suffered.
It used to be quite good on fuel...22 - 25 mpg but i am not getting anywhere near that...even when taking it easy....the thing that has got me baffled is the fuel pump. i can hear it when driving and i never used to be able to (sounds as though it is constantly priming) and the car does not tick over at all now!!!
I have tried resetting the ecu and have tested every sensor in the bible...they all seem ok.
Sorry POD just read what you had put re fuel pump should make a noise....and it has got a recon airflow meter from Douglas Valley parts.....brought that a week ago!!!
>> Edited by andy-w on Sunday 2nd October 17:29
Are all plugs showing equally rich? If so that rules out individual injector faults.
I would check the vac line from the back of the plenum to the fuel pressure regulator, if this drops off you will get far too much fuel pressure under part load conditions.
If you have access to a multimeter, measure the resistance of the coolant temp sender. If the problem was here you'd probably find the problem got worse as the engine warmed up, but it's quick and easy to check the sender so worth doing anyway. The sender is high up at the front of the inlet manifold, you will find a two-wire electrical connector (the same as the ones used on the injectors) onto a sensor which is screwed into the front of the intake manifold close to the thermostat housing. The resistance should be 5kOhms at zero C, roughly halving per 20 C rise.
I would check the vac line from the back of the plenum to the fuel pressure regulator, if this drops off you will get far too much fuel pressure under part load conditions.
If you have access to a multimeter, measure the resistance of the coolant temp sender. If the problem was here you'd probably find the problem got worse as the engine warmed up, but it's quick and easy to check the sender so worth doing anyway. The sender is high up at the front of the inlet manifold, you will find a two-wire electrical connector (the same as the ones used on the injectors) onto a sensor which is screwed into the front of the intake manifold close to the thermostat housing. The resistance should be 5kOhms at zero C, roughly halving per 20 C rise.
Each plug is very black (soot). Same kind of condition as the stepper motor when it is dirty!!!
Hey GV8S...
This fuel pressure hose...is it the one that goes from the start of the fuel rail to the roughly where the stepper motor is mounted to the plenum???
Checked the temp sensor when it was hot and at various stages when cooling with the chart in the bible and all seemed ok.
I WISH AUSTEC HAD A BRANCH IN THE NORTH EAST!!!!!!!!!!!!!!!!!!!
>> Edited by andy-w on Sunday 2nd October 17:48
>> Edited by andy-w on Sunday 2nd October 17:49
Hey GV8S...
This fuel pressure hose...is it the one that goes from the start of the fuel rail to the roughly where the stepper motor is mounted to the plenum???
Checked the temp sensor when it was hot and at various stages when cooling with the chart in the bible and all seemed ok.
I WISH AUSTEC HAD A BRANCH IN THE NORTH EAST!!!!!!!!!!!!!!!!!!!
>> Edited by andy-w on Sunday 2nd October 17:48
>> Edited by andy-w on Sunday 2nd October 17:49
Exactly the same symptoms.. got through almost 40 litres of fuel in just under 50 miles. Did all what has been suggested before but they just can't believe how the fuel goes SO fast without there being a leak.
Cost of the part to fix - £70 incl VAT from TVR francise or... about £20 from anywhere else. By the way, you (and me) have been unlucky because when I rang TVR fancise for the part I was told extremely unlikely - they've only replaced one in five years. So there you go! Hope that helps.
Oops almost forget. FUEL REGULATOR.
Cost of the part to fix - £70 incl VAT from TVR francise or... about £20 from anywhere else. By the way, you (and me) have been unlucky because when I rang TVR fancise for the part I was told extremely unlikely - they've only replaced one in five years. So there you go! Hope that helps.
Oops almost forget. FUEL REGULATOR.
andy-w said:
This fuel pressure hose...is it the one that goes from the start of the fuel rail to the roughly where the stepper motor is mounted to the plenum???
Yes, you should see the fuel pressure regulator plugged into one end of the fuel rail, it has a fuel hose coming out amd a smaller vacuum line which is connected to the plenum close to the stepper motor.
Cheers POD...david and GV8S are talking about the same thing. I shall have to see if i can get a part No from it and get one on order!!!
Anyone know if this is a 5 minute job or a swear and curse 1hr +!!!
I think that this must be the fault becasue the noise comming from the fuel pump sounds as if it is doing overtime!!!
Hopefully looks like you guys have helped me out again.
Cheers.
Anyone know if this is a 5 minute job or a swear and curse 1hr +!!!
I think that this must be the fault becasue the noise comming from the fuel pump sounds as if it is doing overtime!!!
Hopefully looks like you guys have helped me out again.
Cheers.
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