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13-12-2020, 09:48 PM | #1 | ||
FF.Com.Au Hardcore
Join Date: Jan 2005
Location: NSW
Posts: 547
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Hi,
I need help trying to solve a high fuel consumption problem on a 1999 6 Cyl AU1 Fairmont. Driving is usually in the city with short trips and it's averaging 21L/100. It's usually driven gently. I've tried 98 or 91 petrol and econ mode with little difference The car drives and runs smoothly. There is a petrol\strong exhaust smell when car is cold on start up. Only modifications are\were a K&N filter and an XR6 intake scoop The following have been replaced in recent months Center and rear mufflers (due to corrosion) new standard Air filter (was a K&N) Coolant Temp sensor 6x new fuel injectors new fuel pressure regulator new inlet manifold gasket (leak was found) new oxygen sensor new idle control valve Fuel filter was checked. Last replaced 2 years ago spark plugs are about 5 years old The car is in mint condition with low KMs and doesn't do more that 5k per year what are the next steps? Thanks |
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14-12-2020, 09:15 AM | #2 | ||
FF.Com.Au Hardcore
Join Date: Sep 2005
Posts: 1,363
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What's the average speed reading that accompanies that fuel usage ??
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14-12-2020, 09:58 AM | #3 | ||
FF.Com.Au Hardcore
Join Date: Jan 2005
Location: NSW
Posts: 547
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14-12-2020, 05:55 PM | #4 | ||
FF.Com.Au Hardcore
Join Date: Jul 2011
Location: Serpentine W.A.
Posts: 1,639
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Possibly a partially blocked cat converter and I would replace those spark plugs unless they are iridium or platinum plugs
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XC GS OLD SCHOOL MUSCLE Audi A4 S-line quttro Xc falcon Previous fords- xc falcon 500 ,250 x flow 3 speed xc gs worked 250 x flow 4 speed xa Fairmont 302 auto wagon xb falcon 250 log auto 4 door xb falcon 200 log auto ute xc gs project - had to sell :-( xc gs 302 4 speed 4 door xc gs 351 auto 4 door zf fairlane 302 auto zk fairlane 250 x flow carb auto zl fairlane 250 x flow EFI auto xg ute , BA falcon dedicated gas xd, xf x 3 ,ea,eb,ef,au x 3,telstar tx5 |
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15-12-2020, 09:15 AM | #5 | ||
FF.Com.Au Hardcore
Join Date: Sep 2005
Posts: 1,363
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21-12-2020, 08:47 PM | #6 | ||
FF.Com.Au Hardcore
Join Date: Jan 2005
Location: NSW
Posts: 547
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Thanks for the advice
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21-12-2020, 09:36 PM | #7 | ||
Next upgraded Mk1 Leopard
Join Date: Jan 2005
Location: Sydney, in the burbs
Posts: 4,903
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City drive in my old AU II 310 kms from a tank for me. 340 in a good week
UK
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Plastic Surgery 1 AUII Monsoon Blue How 2's: Change rear view mirror, Install backfire valve, Change foam front seats, Install auto transmission cooler, Replace Trans Shift Globe, Remove front door Trim, Paint AU headlights, install door spears, Premium Rear Parcel Shelf, go here...
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