As some of you know I've been having FP problems. When I added the Crane afpr the car ran great for about 2 days, then the spring inside my stock regulator took a dump. $30 to replace it ($95 from GM)Everything was perfect again until a week later. I started dropping fuel pressure from low to high. I went out and spent $80 for a fuel pump and was ready to start tearing the car apart yesterday. Turns out the teflon tape I used on the fuel rail deteriated and got lodged in the sender. Thus, giving my digital gauge a false reading. None got caught in the fuel system.

Anyway, just thought I'd pass it along if no one knows about teflon tape and fuel yet. Jegs techs, Summits techs, and Cranes techs all told me teflon tape would work. Lying bastards

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'92 Formula
305 TPI 5speed
1LE package
Mods: SLP headers,SLP catback,SLP air foil,ported plenum,Crane AFPR (47psi),MSD6AL,AC delco cold plugs, Bosch O2sensor, homemade cold air,K&Ns,3:73s,JET fan switch, Macewen white face gauges...Comp cam (i still have to install it )

[This message has been edited by theformula (edited December 01, 2000).]

 

I dont know exactly where you used teflon tape on your fuel rail. I use liquid telfon thread sealant on the fuel line attachment lines in front of the motor.

Yea, these TPI stuff can be very fustrating to work on and solve drivibilty problems. God knows I've had my share!



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'87 L98 TPI IROCZ, AFR190 heads, 3.70 gears, ZZ9 cam, 2400 Art Carr TC, SLP 1 3/4" headers, SLP cat-back, no cat, no AC, no MAF screens, Accel manifold base & SuperRam, Edelbrock double roller timing chain, MSD ext coil & distributor, trans cooler, 52mm TB with airfoil, TB coolant bypass, AFPR(58psi), K&N filters, Hotchkis lowering springs, Car-Pro custom chip, Lay Ind. ram air kit, 265/45R16 Kumho V700 tires.
ET 13.39sec @ 107.21mph
'90 Eagle Talon AWD, no rust thru 9 winters
'99 Camaro SS, red, 6-spd, T-tops, Mcleod clutch, Pro 5.0 shifter, MAF processor, Direct Flow airlid, K&N filter.
313.7Hp & 320.6ft-lbf, ET 13.55sec @ 105.1mph
next mod: 4.10 rear gears

 

I attached an adaptor to the fuel rail valve, then connected the sender to it. From the adaptor to the sender is where the teflon tape was. Not sure if teflon paste will do any better.

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'92 Formula
305 TPI 5speed
1LE package
Mods: SLP headers,SLP catback,SLP air foil,ported plenum,Crane AFPR (47psi),MSD6AL,AC delco cold plugs, Bosch O2sensor, homemade cold air,K&Ns,3:73s,JET fan switch, Macewen white face gauges

 

Glad you solved your fuel problem.

This is probably like closing the barn door after the horse is out, but maybe it'll help others in the future.

Do not use teflon tape or paste on fittings that are flared or that have integral "O" rings, like the pressure and return lines to the fuel rail or the cold start injector. These type fitting seal by their design.

Using teflon tape on pipe threads is a good idea because those type threads are prone to leaks. Wrapping it on the threads calls for a little special procedure though.

First, leave the first two threads blank, without any tape on them.

Second, the way you wrap the tape is critical to prevent it from unraveling as the fitting is screwed on.

With the threads facing away from you, wrap the threads in a counter-clockwise direction.

With the threads facing you, that is closest to your body, wrap threads in a clock-wise direction.

Don't over-do it either. Two layers is usually enough.

Using these techniques prevents the tape from unraveling and blocking the fitting or possibly breaking off and ending up where it's not wanted. This can really cause a lot of trouble if it gets into your oiling system and blocks an oil passage.

Hope this helps.

Jake

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1986 Corvette Coupe, 415 CID, Edelbrock 6073s, ZZ9