Fuel Leak Troubleshooting Advice/Tips needed
#1
Rotary Freak
Thread Starter
Fuel Leak Troubleshooting Advice/Tips needed
Hey Guys,
My car has sprung a pretty bad Fuel leak(I posted about this before). I pulled the UIM off and now I'm lost. I have the shop manual diagrams. But I still don't know what I am looking at. I mean I can't seem to locate the primary injectors. I have some questions.
Is there and easy process to diagnose my fuel leak?
Is it required to remove the rats nest?
Any advice or links to write-ups would be most appreciated.
Thanks.
John
My car has sprung a pretty bad Fuel leak(I posted about this before). I pulled the UIM off and now I'm lost. I have the shop manual diagrams. But I still don't know what I am looking at. I mean I can't seem to locate the primary injectors. I have some questions.
Is there and easy process to diagnose my fuel leak?
Is it required to remove the rats nest?
Any advice or links to write-ups would be most appreciated.
Thanks.
John
#2
Senior Member
you don't need to remove the rats nest to troubleshoot this. if you haven't done so already jump the GND and F/P terminals in the black diagnostic box. turn the ignition to the ON position and you should hear the fuel pump start and fuel will pressurize the system. at this point take a flashlight and check all the fuel lines, injectors, FPR, and FPD for leakage. if it is a big leak it should be visible. start checking from near the oil filter where the fuel comes in through a hardline, track it through the rats nets, to the secondary injectors, primary injectors, and back through the rats nest hard lines. look, smell, and listen for a leak....
#4
Hooray For Boobies!!!
https://www.rx7club.com/showthread.p...jector+removal
Found this thread the other day. I to am having fuel issues.
Good Luck
Found this thread the other day. I to am having fuel issues.
Good Luck
#5
Rotary Freak
Thread Starter
Thanks guys, this is exactly the information that I was looking for.....My fuel leak is pretty big because I could hear it sizziling on the LIM and totlally smell it. I'll report back.
#6
Rotary Freak
Thread Starter
Originally Posted by alwan16
you don't need to remove the rats nest to troubleshoot this. if you haven't done so already jump the GND and F/P terminals in the black diagnostic box. turn the ignition to the ON position and you should hear the fuel pump start and fuel will pressurize the system. at this point take a flashlight and check all the fuel lines, injectors, FPR, and FPD for leakage. if it is a big leak it should be visible. start checking from near the oil filter where the fuel comes in through a hardline, track it through the rats nets, to the secondary injectors, primary injectors, and back through the rats nest hard lines. look, smell, and listen for a leak....
Last edited by jpandes; 01-26-05 at 01:12 AM.
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#8
Rotary Freak
Thread Starter
Originally Posted by jpandes
Ok, so I did the process outlined above. And it looks like the leak is coming from the top of the primary injector(s). My question is : What is the best /easiest way to "get at" these injectors? Does the rats nest come out or should I just pull off the vacuum lines in the way? I'm trying to avoid any extra work. I'm also afraid that I may never get it back together. It would be really embarassing to have the car towed into Rick's Rotary along with a big-*** box of parts.
#9
Hooray For Boobies!!!
Not sure about the rats nest question because mine was removed.
But I had to pull the UIM as explained. Then I was able to get to the injectors. I found mine to be leaking on the front primary and it was coming from the cracked plastic top. I have two new ones on order right now.
Lets hope you have better luck then I. An o-ring is much cheaper. If it's not one thing its another.
Good Luck.
But I had to pull the UIM as explained. Then I was able to get to the injectors. I found mine to be leaking on the front primary and it was coming from the cracked plastic top. I have two new ones on order right now.
Lets hope you have better luck then I. An o-ring is much cheaper. If it's not one thing its another.
Good Luck.
Last edited by x605p747R1; 01-27-05 at 01:33 PM.
#10
RX-7 Bad Ass
iTrader: (55)
You will have to remove the ACV and the rat's nest to get down to the injectors. None of this is really that tricky - take your time, document what you're doing so you put it back together the same way, etc. Just be patient and keep working.
Dale
Dale
#11
Rotary Freak
Thread Starter
Originally Posted by jpandes
Damnit the pics didn't show up last time
Damn. I was hoping that I wouldn't have to remove the rat's nest. Did the poorman's Non-seq. I wonder if I can permanently remove the rat's nest? I'll go do a search now for a write up on the rat's nest removal. The Shop Manual wasn't much help here.
Thanks Guys! Keep the comments coming. And if any SF/Bay Area guys want help me out with this fuel leak issue. I would greatly appreciate any help. Hell, I pay...
#12
RX-7 Bad Ass
iTrader: (55)
Really, it's not as bad as you would think to remove and re-install the rat's nest. If you take your time with it and not rush, I bet you could be TOTALLY done with the job in a Saturday afternoon.
Dale
Dale
#13
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Join Date: Dec 2003
Location: San Francisco, Ca
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yo man, I had a fire because I swapped out a leaky fpd for a new one but was " trying to avoid extra work" and I didnt do a thorough job cleaning up the fuel that gets stuck in a couple of deep pockets below the primary injectors. I repaired everything myself and did a vac hose job, omp replacement and cleanup of all related parts.
I recommend nuutting it up and doing it PROPER. Either yourself or shell out big$$$.
If you have a garage/driveway just do it yourself. Yes, you should take out the rats nest
Once you gear up to do it and start removing stuff you'll be glad you did. You'll come away knowing everything under that UIM is in good shape
Dude, you do not want to roll out of the Jack in the Box drive-thru in flames! You're in the bay area so if you need a hand pm me
I recommend nuutting it up and doing it PROPER. Either yourself or shell out big$$$.
If you have a garage/driveway just do it yourself. Yes, you should take out the rats nest
Once you gear up to do it and start removing stuff you'll be glad you did. You'll come away knowing everything under that UIM is in good shape
Dude, you do not want to roll out of the Jack in the Box drive-thru in flames! You're in the bay area so if you need a hand pm me
#15
Im a tall midget.
iTrader: (28)
Originally Posted by x605p747R1
BTW: The injectors are a PITA (x2) to get out of the rail. Even with the rail removed sitting on the bench. SOB.
Replace the o-rings on each injector and lube them up with clean motor oil so they slip right in to the fuel rail. Put the metal cover back on and pressurize the fuel system to check for leaks.
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