Gas in my oil
- Thread starter DRUNK411
- Start date
SY2932
Administrator
Re: Gas in my oil
Attach a fuel pressure gauge on the fuel rail and see what your fuel pressure is doing after you turn the key to "ON" and the fuel pump primes the injectors. If it drops to zero psi pretty quickly, that's the cause of the hard starts. The check valve is shot on my truck, it drops to zero in less than two seconds.
Attach a fuel pressure gauge on the fuel rail and see what your fuel pressure is doing after you turn the key to "ON" and the fuel pump primes the injectors. If it drops to zero psi pretty quickly, that's the cause of the hard starts. The check valve is shot on my truck, it drops to zero in less than two seconds.
CarbonFiber AWD
Donating Member
Re: Gas in my oil
Good call.....I just went through a 3 cylinder hydro-locked motor due to that. Although I suspected 3 injectors sticking open as well.
Hope you find the culprit.
Cheers,Vinny:tup:
Good call.....I just went through a 3 cylinder hydro-locked motor due to that. Although I suspected 3 injectors sticking open as well.
Hope you find the culprit.
Cheers,Vinny:tup:
Re: Gas in my oil
The fuel pump and relay are fine the truck runs, it just takes a few seconds to start. Like there is no prime left. I just replaced the pump with a Walbro when I did my tank last week so I know it is not that. Like I said it starts and runs, just not very well. Also there is a hesitation at take off where I have to feather the gas and once it gets through that is it fine. I am kinda leading towards the injectors or atleast one being bad or stuck open. I also changed the fuel filter when I did the tank so I know that is not clogged either. Any other ideas?
The fuel pump and relay are fine the truck runs, it just takes a few seconds to start. Like there is no prime left. I just replaced the pump with a Walbro when I did my tank last week so I know it is not that. Like I said it starts and runs, just not very well. Also there is a hesitation at take off where I have to feather the gas and once it gets through that is it fine. I am kinda leading towards the injectors or atleast one being bad or stuck open. I also changed the fuel filter when I did the tank so I know that is not clogged either. Any other ideas?
SCWolverine
New member
Re: Gas in my oil
Did you check your fuel pressure? (per Mike) Were any of the break-in steps cloneman listed followed? Only part I'd throw at it until you're sure is possibly another FPR (AFPR this time). If you don't KNOW it's broke, don't fix (replace) it, you'll just be adding more variables to your issues. Just because something is new doesn't mean it ain't broke.
Did you check your fuel pressure? (per Mike) Were any of the break-in steps cloneman listed followed? Only part I'd throw at it until you're sure is possibly another FPR (AFPR this time). If you don't KNOW it's broke, don't fix (replace) it, you'll just be adding more variables to your issues. Just because something is new doesn't mean it ain't broke.
CarbonFiber AWD
Donating Member
Re: Gas in my oil
How true......my problem surfaced immediatly following the Walbro install....and setting idle for 2 nites while traveling.
Replaced the stock FPR witha ADJ. one.....and then also the injectors to solve the problem. Sort of a chain of componets that needed it.
How true......my problem surfaced immediatly following the Walbro install....and setting idle for 2 nites while traveling.
Replaced the stock FPR witha ADJ. one.....and then also the injectors to solve the problem. Sort of a chain of componets that needed it.
Re: Gas in my oil
I am in the process of getting my garage cleaned up so I can pull her back in and take my time on it. I have a set of injectors I believe are 50# from my other truck, how do I know if they are or not? I was thinking putting those on there and AFPR and going from there. What else do I need to do if I get 50# injectors for the truck? I have a whole other fuel rail I was going to get everything setup out of the truck and just drop it in. Also id there a spot on the rail for a FP guage or should I get one for my pod?
I am in the process of getting my garage cleaned up so I can pull her back in and take my time on it. I have a set of injectors I believe are 50# from my other truck, how do I know if they are or not? I was thinking putting those on there and AFPR and going from there. What else do I need to do if I get 50# injectors for the truck? I have a whole other fuel rail I was going to get everything setup out of the truck and just drop it in. Also id there a spot on the rail for a FP guage or should I get one for my pod?
SCWolverine
New member
Re: Gas in my oil
Schrader valve on drivers side rail to test/hook up sender (looks like a short, metal valve stem). You "have to" have an electric if you mount the gauge in the cab (or at least an isolator). Couple hundred bucks either way, but well worth it for the peace of mind IMO. You should be able to find a simple tester for $30-$40 tops (or borrow one).
Edit: If you go electric, don't mount the sender directly to the rail. As small as it may seem, you don't want the weight of it supported only by the fuel rail.
Schrader valve on drivers side rail to test/hook up sender (looks like a short, metal valve stem). You "have to" have an electric if you mount the gauge in the cab (or at least an isolator). Couple hundred bucks either way, but well worth it for the peace of mind IMO. You should be able to find a simple tester for $30-$40 tops (or borrow one).
Edit: If you go electric, don't mount the sender directly to the rail. As small as it may seem, you don't want the weight of it supported only by the fuel rail.
Re: Gas in my oil
Ok guys I finally got my truck back in the garage to work on her today, and found out that there is no gas in the line on the top of the FPR and none coming out of the top of it with the pump on or witht he truck running. I also checked the lines going to the canister and there is no gas in them or the strong smell of gas coming from them. So I am leaning towards a bad injector. But I was going through some stuff today and found a rail with injectors and what I think is a AFPR on it that I bought a few years back for my other truck that is not done yet. How do I know if these are 50# injectors Iike I think they are. I bought them from someone on here and never installed them on my truck and they look like they were never installed on his truck either. The only number I could find on them are D3181AA and 621031 on the injectors and the FPR is a Bosch 0 280 160 237. I can get some pics if need to be if it helps. I was thinking about puttting this rail on it along with a fuel pressure guard from RPM or somewhere and seeing if that fixes the problem. But I know I need to other stuff like a chip and stuff but I am not sure what else needs to be done. So I guess my question is what else do I need to do and do you think it would be a good idea to put these injectors and FPR on there is they are when I think they are? Another note I just installed a Walbro 255 on it. I think that is also part of upgrading to 50# injectors. Thanks
Ok guys I finally got my truck back in the garage to work on her today, and found out that there is no gas in the line on the top of the FPR and none coming out of the top of it with the pump on or witht he truck running. I also checked the lines going to the canister and there is no gas in them or the strong smell of gas coming from them. So I am leaning towards a bad injector. But I was going through some stuff today and found a rail with injectors and what I think is a AFPR on it that I bought a few years back for my other truck that is not done yet. How do I know if these are 50# injectors Iike I think they are. I bought them from someone on here and never installed them on my truck and they look like they were never installed on his truck either. The only number I could find on them are D3181AA and 621031 on the injectors and the FPR is a Bosch 0 280 160 237. I can get some pics if need to be if it helps. I was thinking about puttting this rail on it along with a fuel pressure guard from RPM or somewhere and seeing if that fixes the problem. But I know I need to other stuff like a chip and stuff but I am not sure what else needs to be done. So I guess my question is what else do I need to do and do you think it would be a good idea to put these injectors and FPR on there is they are when I think they are? Another note I just installed a Walbro 255 on it. I think that is also part of upgrading to 50# injectors. Thanks
SCWolverine
New member
Re: Gas in my oil
What did your FP measure on the rail? If you insist on messing with the injectors, why not pull what's in there and have them cleaned/checked? Adding unknowns (injectors) to existing issues (whatever they may be) is asking for more of a headache. Get it running right, then upgrade...doubt you'll find anyone with a decent running truck with mods of any kind who'll tell you differently.
What did your FP measure on the rail? If you insist on messing with the injectors, why not pull what's in there and have them cleaned/checked? Adding unknowns (injectors) to existing issues (whatever they may be) is asking for more of a headache. Get it running right, then upgrade...doubt you'll find anyone with a decent running truck with mods of any kind who'll tell you differently.
Don W.
Stab it and steer it
Re: Gas in my oil
D3181AA (42 lb/hr)
http://www.racetronix.com/621031.html
As mentioned don't change injs. just to be changing. Different flow injs require a different (modified) chip. I'm not qualified to to tell you what goes with what but there are a bunch of folks here that are. Fix what you got first or you'll end up a truck that may not even start and you'll be loosing hair from there.
D3181AA (42 lb/hr)
http://www.racetronix.com/621031.html
As mentioned don't change injs. just to be changing. Different flow injs require a different (modified) chip. I'm not qualified to to tell you what goes with what but there are a bunch of folks here that are. Fix what you got first or you'll end up a truck that may not even start and you'll be loosing hair from there.
Re: Gas in my oil
I did not measure the pressure at the rail yet I did not have time to go to get a tester yet, I am going to do that tomorrow and see what it says. Once I do that I will go from there I was just asking if this would be a good idea, since I have the whole setup sitting here waiting. But once I find out the pressure at the rail I will be sure to let you know. Thanks for all the help so far guys I really appreciate it, just want to get her running correct thats all.
I did not measure the pressure at the rail yet I did not have time to go to get a tester yet, I am going to do that tomorrow and see what it says. Once I do that I will go from there I was just asking if this would be a good idea, since I have the whole setup sitting here waiting. But once I find out the pressure at the rail I will be sure to let you know. Thanks for all the help so far guys I really appreciate it, just want to get her running correct thats all.
Re: Gas in my oil
So I just tested the fuel pressure at the rail and when I turn the key on it jumps up to about 42psi (which I believe is normal) then within seconds it is back to zero (which I believe is not normal) When the truck is running it is around 35psi. Any ideas of what it could be from that info?
So I just tested the fuel pressure at the rail and when I turn the key on it jumps up to about 42psi (which I believe is normal) then within seconds it is back to zero (which I believe is not normal) When the truck is running it is around 35psi. Any ideas of what it could be from that info?
SCWolverine
New member
Re: Gas in my oil
With FP answered... per Mike (above) sounds like the check valve is toast (rail losing pressure really fast), Id get that fixed first (Shouldn't be related, but...). From there, if it were me I'd pull the injectors for clean/check (piece of mind, plus proof they're good when you upgrade (and sell)). AFPR, & WBO2 would be the next things I threw at it.
With FP answered... per Mike (above) sounds like the check valve is toast (rail losing pressure really fast), Id get that fixed first (Shouldn't be related, but...). From there, if it were me I'd pull the injectors for clean/check (piece of mind, plus proof they're good when you upgrade (and sell)). AFPR, & WBO2 would be the next things I threw at it.
ffmeltdown
Donating Member
Re: Gas in my oil
Does the vehicle idle smooth? Other than the hesitation are there other driveablity issues? if it doesnt run smooth then my guess would also be leaning toward injectors. If you can disconnect the vac line to the fpr and plug the fuel rail suppy with a special plug used when cleaning the injectors and pressureize the rail via shrader valve it should hold pressure. Dont pressurize it too much though. If it doesnt hold pressure then you KNOW its the injectors.... well it could be the fpr too unless you plugged the return line also. Just a thought.
Respectfully,
Tom
Does the vehicle idle smooth? Other than the hesitation are there other driveablity issues? if it doesnt run smooth then my guess would also be leaning toward injectors. If you can disconnect the vac line to the fpr and plug the fuel rail suppy with a special plug used when cleaning the injectors and pressureize the rail via shrader valve it should hold pressure. Dont pressurize it too much though. If it doesnt hold pressure then you KNOW its the injectors.... well it could be the fpr too unless you plugged the return line also. Just a thought.
Respectfully,
Tom