Page 1 of 5 123 ... LastLast
Results 1 to 10 of 48

Thread: Getting atrocious mileage?

  1. #1
    Join Date
    May 2018
    Location
    Albany, NY
    Posts
    112

    Default Getting atrocious mileage?

    Since buying the 7 last year I'm still slowly figuring and sorting out misc problems as I've put maybe 500 miles on the car, likely under that.

    The recent is that I feel like I'm filling up far too often. I don't have a working odometer as the speedometer has been swapped for a SPA unit since original build and the speed output hasn't worked right for at least 10 years from what I've gathered. I don't even know if it's tranny pickup or hall sensor on rear axle (didn't see anything on axles)

    Now while fixing that is on the list, I've decided to test the MPG the old fashioned way. Filled up in one area, drove 8 miles highway and filled up again. Used right around 1.1 gallons.

    Today I drove about 50 miles and am at half tank already.


    Lets say empirically, with variables I average 10mpg. Thats quite low isn't it?



    2001 Zetec, Jenvey ITB's, injectors have been swapped to high impedance. Pectel ECU.

    I haven't done a compression test but thats probably going to happen soon.

    Car feels quite peppy but I can't tell if I'm down on power as I have nothing to compare it to.

    Oil doesn't smell like gas.

    No obvious leaks anywhere, I fixed a previous return like leak.

    Any ideas of what else to check for? I should be getting about 20mpg or more, no?
    2001 Caterham Superlight R

  2. #2
    Join Date
    Apr 2013
    Posts
    53

    Default

    Certainly pull your plugs to see if they indicate that you've been running rich. Does the Pectel ECU tuning software give you the opportunity to check your AFRs through the rev range?

  3. #3
    Join Date
    May 2018
    Location
    Albany, NY
    Posts
    112

    Default

    Quote Originally Posted by jcerier View Post
    Certainly pull your plugs to see if they indicate that you've been running rich. Does the Pectel ECU tuning software give you the opportunity to check your AFRs through the rev range?
    Checked the plugs and I'll upload pictures but in meantime I created a new problem.

    Some of the crud around spark plug has fallen onto the cylinder and now I'm trying to master mind a way to get it out.


    I know nothing about data logging the Pectel unfortunately. I'll have to look into it.
    2001 Caterham Superlight R

  4. #4
    Join Date
    Feb 2009
    Location
    NYC
    Posts
    4,213

    Default

    Quote Originally Posted by Vovchandr View Post

    Some of the crud around spark plug has fallen onto the cylinder and now I'm trying to master mind a way to get it out.
    Vacuum cleaner - adapt something as a nozzle to fit into the spark plug hole.
    Mike
    2010 Caterham CSR with Cosworth 2.3 Duratec
    2018 Caterham 420R with 2L Duratec 210hp at Donington UK
    1975 BMW CSL Group 4 (restoration - engine and dry sump install time)
    1977 Holden Torana "A9X" (awaiting restoration)
    1985 Holden Commodore Group A (restoration - engine rebuild)
    1982 Ferrari 400i (will repaint to original color in 2020)
    1965 Ford Mustang Fastback "Holman Moody"
    1992 Ford Escort RS Cosworth WRC (fettling after long period of storage)
    1990 Range Rover 2 door Classic

  5. #5
    Join Date
    May 2010
    Location
    Laurel MD
    Posts
    122

    Default

    I think your new problem has answered your first question. If you have that much crud on the plugs your probably running very rich.

    Graham

  6. #6
    Join Date
    Jul 2009
    Location
    Arkansas and . . .
    Posts
    3,244

    Default

    Quote Originally Posted by Vovchandr View Post
    Some of the crud around spark plug has fallen onto the cylinder and now I'm trying to master mind a way to get it out.
    Portable air tank. Blow it out with compressed air.
    Stalker V8, chassis #85

    Stalker Chassis #85 Build Gallery
    Stalker Chassis #85 Owner Thread

    Get up in the morning and give the day your very best. You donít get it back.

  7. #7
    Join Date
    Aug 2008
    Location
    Iowa
    Posts
    118

    Default

    Quote Originally Posted by xcarguy View Post
    Portable air tank. Blow it out with compressed air.
    That would probably blow more chunks into the crevice above the top ring than back out the spark plug hole. I like the idea of taping clear plastic tubing to a vacuum cleaner hose better.

  8. #8
    Join Date
    May 2018
    Location
    Albany, NY
    Posts
    112

    Default

    Here are some pictures.

    #1 tunnel - only really dirty one



    #1 plug


    Attached Thumbnails Attached Thumbnails Click image for larger version. 

Name:	fxQg4Ri.jpg 
Views:	167 
Size:	47.5 KB 
ID:	15338  

    Click image for larger version. 

Name:	hUrHfck.jpg 
Views:	163 
Size:	28.2 KB 
ID:	15339  

    Click image for larger version. 

Name:	GMSPQ4P.jpg 
Views:	161 
Size:	43.6 KB 
ID:	15340  

    Click image for larger version. 

Name:	jEnQDPI.jpg 
Views:	4 
Size:	31.4 KB 
ID:	15341  

    2001 Caterham Superlight R

  9. #9
    Join Date
    May 2018
    Location
    Albany, NY
    Posts
    112

    Default

    Cylinder and rest of plugs







    Attached Thumbnails Attached Thumbnails Click image for larger version. 

Name:	HdJSdCi.jpg 
Views:	158 
Size:	22.6 KB 
ID:	15342  

    Click image for larger version. 

Name:	D9dUusx.jpg 
Views:	161 
Size:	33.3 KB 
ID:	15343  

    Click image for larger version. 

Name:	JgWueZz.jpg 
Views:	158 
Size:	28.0 KB 
ID:	15344  

    Click image for larger version. 

Name:	KCCFbNH.jpg 
Views:	167 
Size:	46.0 KB 
ID:	15345  

    2001 Caterham Superlight R

  10. #10
    Join Date
    Feb 2009
    Location
    NYC
    Posts
    4,213

    Default

    What is that stuff on the plugs? Mud?
    Mike
    2010 Caterham CSR with Cosworth 2.3 Duratec
    2018 Caterham 420R with 2L Duratec 210hp at Donington UK
    1975 BMW CSL Group 4 (restoration - engine and dry sump install time)
    1977 Holden Torana "A9X" (awaiting restoration)
    1985 Holden Commodore Group A (restoration - engine rebuild)
    1982 Ferrari 400i (will repaint to original color in 2020)
    1965 Ford Mustang Fastback "Holman Moody"
    1992 Ford Escort RS Cosworth WRC (fettling after long period of storage)
    1990 Range Rover 2 door Classic

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •