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1998 Vauxhall Vectra Excessive fuel consumption

Tiny
MAXI_P
  • MEMBER
  • 1998 VAUXHALL VECTRA
Engine Performance problem
1998 Vauxhall Vectra 4 cyl Two Wheel Drive Manual

hi there, hope someone can help.

my vectra is sucking too much fuel, despite the fact that I have serviced it, incl changing the fuel filter.

The following have also been changed :-

air flow meter, lambda sensor, crank sensor, coolant temp sensor, egr valve. The breather pipes have all been removed and cleaned, so too has the throttle body. None of this has made any difference to the fuel consumption.

The car drives absolutely fine, ie no irratic idling, it doesnt cut out for no reason, there are no faults logged on ecu - this has been checked by vaux technician with tech2 machine. The exhaust isnt blowing.

i have done much as I can to try and resolve this issue, but cant seem to get to the bottom of it.

Any help/guidance will be greatly appreciated.

Maxi
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Thursday, February 11th, 2010 AT 12:59 PM

7 Replies

Tiny
DAVE H
  • MECHANIC
  • 13,383 POSTS
Replace the fuel pressure regulator
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Monday, February 22nd, 2010 AT 6:12 AM
Tiny
MAXI_P
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Hi Dave,

thanks for that - I have ordered a fuel pressure regulator 2day, once it arrives I will fit & test it, then post the results on here - I really hope this solves the issue.

Maxi
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Monday, February 22nd, 2010 AT 2:13 PM
Tiny
DAVE H
  • MECHANIC
  • 13,383 POSTS
No problem .. keep us informed ..


https://www.2carpros.com/forum/automotive_pictures/266999_AAA2_986.png

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Monday, February 22nd, 2010 AT 4:19 PM
Tiny
MAXI_P
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  • 6 POSTS
Hi Dave,

I recieved and fitted FPR today - only driven bout 6 miles since new one been fitted - so cant, as yet, say if it has made any difference, the car seems to be driving fine - just like it did before.

Just a couple of quick questions for you, is there anyway to check/test the FPR that I have taken out from the car? To see if indeed it is faulty?

Also is there a way to see for certain if the new one ive fitted is actually functioning correctly?

Thanking you in anticipation

Maxi
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Wednesday, February 24th, 2010 AT 2:58 PM
Tiny
DAVE H
  • MECHANIC
  • 13,383 POSTS
You will need to know the pressure reading. I do not have the correct PSI for your vehicle. To test the old one it will have to be re-installed on vehicle and check it is supplying the correct pressure. Pressure (PSI) test the new one in the same way using a fuel pressure tester
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Wednesday, February 24th, 2010 AT 3:53 PM
Tiny
MAXI_P
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Cheers Dave,

I will take it to my mates garage and ask him to pressure test it for me.

Will post findings later on.

Maxi
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Wednesday, February 24th, 2010 AT 4:27 PM
Tiny
MAXI_P
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Hi Dave,

Its been a few days since changing the FPR - no difference in performance or fuel consumption.

Somebody suggested getting the injectors checked out - so I did. Just wanted to ask you, do you know how many milliseconds the injectors are supposed to stay open for? Ive tried searching the web for an answer but found nothing of any use.

Maxi
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Saturday, February 27th, 2010 AT 2:19 PM

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