Walbro Install Help
Dec 26, 2008 | 07:50 PM
#16
We are talking about two different o-rings, though maybe this is still my problem. I am talking about the small o-ring in the small cylinder that runs parrallel to the large cylinder housing the pump itself, how is this supposed to be assembled because it seems like a cutoff switch and I likely triggered it trying to shake some of the excess fuel out.
Dec 26, 2008 | 07:51 PM
#17
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From: Chicagoland
From Rockmans link... You cant see some of the text as it is white over white...
I am not really sure why this part is removed for changing the fuel pump. If you did take this portion of the fuel sending unit apart, this could also be the issue.
Originally Posted by Rockman
*****PLEASE READ*****
If your like me then you put it all together and were thinking a job well done and then you went to go crank your car and guess what it will not start up lol. Nomatter what you do it will also crank but not quite make it and your left wondering i install correctly whats the deal. It took me 4 hours to figure this out lol. Hence if your new to install fuel pumps it happens. Ill save you the time. If you look a BLACK plug to unplugged during uninstallation of old pump there is a O RING in there. LOL if your like me the ring did not fall out so i never knew it was there. If that ring is not Flush inside that plug then you will not get any fuel pressure at all hints not fuel going anywhere and the reason the car will not crank. Here are pics to solve this problem just take ring out place it ontop of plug and pop back in place.
If your like me then you put it all together and were thinking a job well done and then you went to go crank your car and guess what it will not start up lol. Nomatter what you do it will also crank but not quite make it and your left wondering i install correctly whats the deal. It took me 4 hours to figure this out lol. Hence if your new to install fuel pumps it happens. Ill save you the time. If you look a BLACK plug to unplugged during uninstallation of old pump there is a O RING in there. LOL if your like me the ring did not fall out so i never knew it was there. If that ring is not Flush inside that plug then you will not get any fuel pressure at all hints not fuel going anywhere and the reason the car will not crank. Here are pics to solve this problem just take ring out place it ontop of plug and pop back in place.
Dec 26, 2008 | 07:53 PM
#18
Initially I did not take this apart, I did after RockmanX's advice which agreed with where my troubleshooting was going. Do you know what the function of this plug is? Or where the is a diagram of the proper assembly of the unit? I am inclinded to believe its a cutoff switch and I triggered it the first time around and improperly reset it the second time. I need to figure this out! Thanks so far guys!
Dec 26, 2008 | 08:13 PM
#20
Anything on either of the o-rings?? I am not understanding what it means for either to be seated properly. Could there be any issue with using the new isolator gasket which is on the bottom of the pump and about twice as thick as the original one.
Dec 26, 2008 | 08:56 PM
#22
... I may have to take you up on that... However, I am not ready to give up.
How should these o-rings be seated? I have the whole assembly disassembled again and will try another go at this, is there a specific way the gaskets both on the pump itself and on the side cylinder should fit?
How should these o-rings be seated? I have the whole assembly disassembled again and will try another go at this, is there a specific way the gaskets both on the pump itself and on the side cylinder should fit?
Dec 26, 2008 | 09:03 PM
#23
LOL i been reading this and i keep telling you to call me im pretty sure its the same problem. You need to take that black plug out and if NO O-ring falls out then its not seated properly that means no fuel pressure hints no crank. SO look inside that hole to find the ring pull it out using something small and place the O-ring on top of the black plug then plug it back in the harness problem solve. ALSO make sure you assemble the pump correctly and plug it in correct my website has all those goodies.
Dec 26, 2008 | 09:09 PM
#24
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From: Chicagoland
I have never personally taken that portion of the sending unit apart. I would refer to Rockman's advice on this. The pictures on his website show the o-ring stuck in the sending unit. If it is, do as he suggested and pull the o-ring out, place it on top of the plug and put the plug back in. I would assume the o-ring would sit on top of the plug similar to how it sits on the cap in Rockman's picture HERE
Dec 26, 2008 | 10:07 PM
#25
ok they both called me ivan i walked them though the whole deal. They understand it now. Thats the best thing about calling somebody its alot easier to explain it then to type it for sure. I swear a fuel pump install sounds like its sooooooooooooooo easy but can end up beening a pain in the A$$ 
Dec 26, 2008 | 10:33 PM
#26
^^^ hell ya it is, 30 min is a load of ****. Anyway, thanks Rockman and Ivan, I have one more course of action thanks to Rockman that I will try in the morning and I think there are good odds on it. Well see... wish me luck
Dec 27, 2008 | 02:53 PM
#27
Well after install number FOUR failed this morning I needed to determine whether my sending unit was screwed up or if it was the pump. After throwing the original pump back in, the car fired right up. The only thing I can determine at this point is that either the pump is bad (though it was clearly running) or the FP342 pump is not compatible with the Evo despite Forced Performance's recommendation. When FP rolls back into their office on Jan 4th I will attempt to get this straightened out. Either way, i need a new pump!
Oh and as a side note, 23ft-lbs of torque on the top bolts is TOO MUCH. I now have one sheared stud! I assure you my wrench was properly set and I did not twist or torque improperly. I realize that anything broken is not ideal, however, i do feel that with 5/6 bolts tightened onto the gasket, the seal should be sufficient. If some one knows for a fact that I am incorrect, let me know, otherwise, keep the hearsay to yourselves.
A lot of thanks to Ivan and Rockman for spending some time trying to help me out. Too bad it didnt matter how good your advice was when the pump was not working! Even after this failed install, it feels good to be a part of the EvoM community
Oh and as a side note, 23ft-lbs of torque on the top bolts is TOO MUCH. I now have one sheared stud! I assure you my wrench was properly set and I did not twist or torque improperly. I realize that anything broken is not ideal, however, i do feel that with 5/6 bolts tightened onto the gasket, the seal should be sufficient. If some one knows for a fact that I am incorrect, let me know, otherwise, keep the hearsay to yourselves.
A lot of thanks to Ivan and Rockman for spending some time trying to help me out. Too bad it didnt matter how good your advice was when the pump was not working! Even after this failed install, it feels good to be a part of the EvoM community
Dec 27, 2008 | 09:01 PM
#29
lol figures i know my directions were too good to fail. LOL part failure peace of junk i have a walbro 255 pump for sale. when i changed mine out i did not know the orginal owner put one in so i said oh well and threw the new one in so i have a extra one ill sell it for 60+shipping if you want it im never gonna use it. btw i NEVER TORQUED the top bolts so no chance at stripping anything lol just tighten till they were nice and firm. NOOOOOOOOOOOO PROBLEMS PERIOD.
Dec 27, 2008 | 09:50 PM
#30
Oh and as a side note, 23ft-lbs of torque on the top bolts is TOO MUCH. I now have one sheared stud! I assure you my wrench was properly set and I did not twist or torque improperly. I realize that anything broken is not ideal, however, i do feel that with 5/6 bolts tightened onto the gasket, the seal should be sufficient. If some one knows for a fact that I am incorrect, let me know, otherwise, keep the hearsay to yourselves.