Dr.Gonzo
New Member
- Joined
- Jan 8, 2016
- Messages
- 11
- Reaction score
- 0
- Points
- 1
- Location
- Vancouver BC, Canada
- Vehicle Year
- 1988
- Make / Model
- Ford
- Engine Size
- 2.9l
- Transmission
- Automatic
Hi all,
I have 1988 Bronco II XL 2.9l 2WD with Auto trans. Car has 250.000 km (155.000 mi) I bought it 3 years ago. I'm a metric guy but I'll try to use both systems in my posts to make things easier for everyone.
My B2 is a daily driver, city mostly with a bit of highway combined. My mileage is pretty terrible lately. 22l /100km (10 mpg). It was around 15l/100km (15mpg) before these issues started and I was ok with that. I know it can do even better than that but if I can get it back to 15 I'll be happy. I think it should be 17mpg in the city when the car is brand new. The best I got out of it was 10l/100km (23mpg) on the highway last year.
I did a lot of reading on the forums and I know that this is another fuel issue/bad gas mileage thread but I figured repeating and talking about it again can't be bad thing. I wanted to share my problem to help others as well.
What I did so far :
Made the jumper cable and pulled out the codes. I'm not sure if I got it right but I think I got 11 (System OK). It's either that or 22 cause I'm not sure about the pause in between the flashes. If the system repeats the codes twice then it is 11.
Got the same codes for KOEO and KOER.
I can hear both pumps priming when I turn the key. Bought the fuel pressure tester and took the readings. I have 30 psi in the system with engine running (Should this be 40?). When I turn the engine off pressure starts to drop right away. Not rapidly to zero but in less then 2 min drops to 10 psi. I didn't wait to see how fast it will get to 0 cause this was enough for me. There must be a leak in the system.
Inspected fuel lines from the engine all the way back to the tank, no visual leaks, looks dry. All the connections on the tank, canister filter, hi pressure pump, inline filter, all the way up to FPR look ok.
Pulled the vacuum hose of the FPR, no leaks. I can smell gas a bit but it is dry. I'm not sure if this is my main problem.
Wanted to pinch the lines to diagnose further but looks like i have plastic hoses coming to the FPR so I gave up on that idea for now until I figure out how to do it.
I have new FPR and O2 sensor on the way. Decided to replace FPR anyway cause it looks like it has been there from day one. I'm not sure if I should touch O2 at all but it can't hurt changing it, I guess...
I've red that a bad check valve on the low pressure pump can cause pressure loss but I'm not sure if that can be related to my problem.
Is there a possibility that I have a leaky injector?
I have to change valve cover gaskets soon, so I was thinking of pulling the injectors out and clean them anyway.
Is there a way to determine if the injector is cracked?
Engine is dirty and oily in that area cause of the gaskets. Can all that oil mess up the injectors in some way and cause leaks on them?
I replaced fuel filter less than a year ago. Will change it when I get FPR. Last year I did spark plugs, cables, cap and rotor. Changed PCV valve and grommet 6 months ago. Idle control valve has been cleaned at that same time. I have new air filter in. Vacuum Hoses and PCV hose looks good but I might change them all in near future. At least I will know when it was done.
Car starts great cold, a bit of hesitation when it is warm but now I can address that to loss of pressure? Idle is ok, sputters a bit but it doesn't look or sound really bad. Runs fine to me.
Is there anything else I should check? Any thoughts? What would you do?
Thank you for your time!
I have 1988 Bronco II XL 2.9l 2WD with Auto trans. Car has 250.000 km (155.000 mi) I bought it 3 years ago. I'm a metric guy but I'll try to use both systems in my posts to make things easier for everyone.
My B2 is a daily driver, city mostly with a bit of highway combined. My mileage is pretty terrible lately. 22l /100km (10 mpg). It was around 15l/100km (15mpg) before these issues started and I was ok with that. I know it can do even better than that but if I can get it back to 15 I'll be happy. I think it should be 17mpg in the city when the car is brand new. The best I got out of it was 10l/100km (23mpg) on the highway last year.
I did a lot of reading on the forums and I know that this is another fuel issue/bad gas mileage thread but I figured repeating and talking about it again can't be bad thing. I wanted to share my problem to help others as well.
What I did so far :
Made the jumper cable and pulled out the codes. I'm not sure if I got it right but I think I got 11 (System OK). It's either that or 22 cause I'm not sure about the pause in between the flashes. If the system repeats the codes twice then it is 11.
Got the same codes for KOEO and KOER.
I can hear both pumps priming when I turn the key. Bought the fuel pressure tester and took the readings. I have 30 psi in the system with engine running (Should this be 40?). When I turn the engine off pressure starts to drop right away. Not rapidly to zero but in less then 2 min drops to 10 psi. I didn't wait to see how fast it will get to 0 cause this was enough for me. There must be a leak in the system.
Inspected fuel lines from the engine all the way back to the tank, no visual leaks, looks dry. All the connections on the tank, canister filter, hi pressure pump, inline filter, all the way up to FPR look ok.
Pulled the vacuum hose of the FPR, no leaks. I can smell gas a bit but it is dry. I'm not sure if this is my main problem.
Wanted to pinch the lines to diagnose further but looks like i have plastic hoses coming to the FPR so I gave up on that idea for now until I figure out how to do it.
I have new FPR and O2 sensor on the way. Decided to replace FPR anyway cause it looks like it has been there from day one. I'm not sure if I should touch O2 at all but it can't hurt changing it, I guess...
I've red that a bad check valve on the low pressure pump can cause pressure loss but I'm not sure if that can be related to my problem.
Is there a possibility that I have a leaky injector?
I have to change valve cover gaskets soon, so I was thinking of pulling the injectors out and clean them anyway.
Is there a way to determine if the injector is cracked?
Engine is dirty and oily in that area cause of the gaskets. Can all that oil mess up the injectors in some way and cause leaks on them?
I replaced fuel filter less than a year ago. Will change it when I get FPR. Last year I did spark plugs, cables, cap and rotor. Changed PCV valve and grommet 6 months ago. Idle control valve has been cleaned at that same time. I have new air filter in. Vacuum Hoses and PCV hose looks good but I might change them all in near future. At least I will know when it was done.
Car starts great cold, a bit of hesitation when it is warm but now I can address that to loss of pressure? Idle is ok, sputters a bit but it doesn't look or sound really bad. Runs fine to me.
Is there anything else I should check? Any thoughts? What would you do?
Thank you for your time!
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