Well I installed the FASS 150 pump tonight. Not a job I want to to every day unless I can turn myself into Gumby, but got it done anyhow. Everything started up fine, no codes or issues with the R49 but I have a question now that I never though of before the install. Will there be any fuel issues (lack of) with the motor in cool down mode on the R49 while the FASS is not running?

BTW, that pump is loud. It kinda changes its sound while running, going up and down at times (even after the grid heaters are off) is that normal for these units?

Any experiences with this would be appreciated.

 

not sure why you used the fass150 the 95 will cover over 600 hp and 1200 lb . the fuel pump is off while in cool down? will not run long. good thing the cp3 is not like the vp44 and failure prone.

 

My FASS 95gph is so quite that I can not tell if it is running after the truck starts.

I have had my TST PMCR R49 since they were available. I worried a little about using the cool down feature at first since I don't "think" my FASS is running in cool down mode. But now I use the cool down timer almost everytime I stop. I have seen no issues so far and it has been 6 months or so.

 

I used the 150 because the 95 had been on backorder for 2 weeks. I ordered the unit from TST, I called down after not getting the 95, I asked if they had a 150, they did, I got it. (My neighbor is having the same problem with a 95 from Piers, backordered 10 days now.)

John,

Thanks for the experienced info. I will just continue to use the cool down feature like usual, amazing how much you use it when you got it!

BTW, I went down last weekend to HotRod, Mike was awsome in showing me around the transmission and common problems and what he does to improve them. Very impressed with him and his service, might give him a try soon. I'll be back down to Houston in a week or so, Magnolia's Bar/Beer?? Shoot me a PM, I am at the house.

 

Michael is very thorough in anything he does. He pays attention to detail and can really talk a while when he gets started on the 48re. I am happy with all of the work he has done on my truck.

I'll PM you a little later, meetings eating me up most of the day. Band not playing next week. Maybe somewhere else??

John

 

Ok, FASS is running quieter now. I put some rubber washers between the FASS mounting bracket and the bed frame. New problem is that I can't use the cool down feature. How are you R49 users getting the pump to continue to run until the engine shuts off? Must be some way to use the factory relay and a different power supply other than the cigar fuse? That would also let the pump shut down when the key is in the ignition position for listening to the radio and such.

Must be some of you out there have found a way around this problem? Any advice would be great. Calling TST in the morning.

 

WHat do you mean you can not use the cool down feature? It doesn't work?

The reason I ask is mine does not work...shut the key off the truck quits...TST & I have trouble shot it, I sent it back to them and they have no problem with it, said it was fine.

Very interested to know.

 

Ps, The Cool Down feature is still working, no problems at all with the PMCR. The truck runs for a little bit (20-30 sec., I only did it twice since it can't be healthy for the cp3) then basically runs out of fuel. When I started it back up, it had to crank over for 3-4 seconds so I know it was starved in the injection pump.

Any other idea's for a different power supply to the FASS w/the use of the factory relay??


Why couldn't the factory pump be able to pump crazy amounts of fuel just for the fun of it so we didn't have to go through all this fuel supply crap or another company would make a "drop in" pump assembly that would just replace the factory unit. I've been modifying 3 different CTD's for over 8 years now and all this electrical engine stuff is starting to _ _ _ _ me off.

 

The reason the power supply is tapped from the accessory relay is that the stock lift pump circuit won't handle the FASS Draw. I see no problem having the stock lift pump circuit run a relay for a direct fused power supply from the battery. The stock lift pump ran when the truck ran. I hate having the FASS on the accessory circuit you have to crank the stereo to cover the pump running. The FASS 150 is necessary if you intend to run bigger injectors with a modified CP3 an then you have to bump the psi up to 40 to keep up. . ks

 

I would think if you are using the existing pump wiring the pump should continue to run. The stock pump would have to continue to run. When TST answers please post.

 

Hold on a minute.....Is your FASS relay not fired by the stock pump harness???

 

Ps, No it is not, it is getting its power from the cigar lighter fuse. This is a keyed power supply, key off = power off. The R49 allowed the stock pump to continue running until the engine shut down, so it was never an issue.

I called TST this morning, they are aware of the problem and are working on a fix. Mark is having the same situation with his 06 CTD that he is driving with the R49 feature. The said to call back in a couple of weeks and hopefully they should have a solution for it.

I think FASS should make a jumper harness that goes between the factory pump plug on the tank. It can allow the sending unit to still function back to the factory harness but the power from the pump relay will go to the FASS unit instead (no through power supply to the factory pump in the tank). This would be a MUCH cleaner and simpler install than what they currently offer! Those fuse taps they supply are way too big for the fuse sockets, what a PITA to slide the fuse back in.

 

I had assumed they would have done something like what you describe Bud. Of course mine is fired off the orginal harness coming off the engine mounted pump.

Good luck.

 

My FASS gets its power from the battery but the relay is run by the stock lift pump harness. The FASS does draw more current than the 5 volts from the ECU for the stock lift pump. The problem is the stock lift pump circuit is also on the key so either way you are not going to pump with the key off. If you go with another circuit to run the FASS that isn't keyed then I would think hot starts would become a problem and wouldn't the pump run all of the time?

Looks like TST will have to provide a 5 volt signal out of the TST to run a relay on the pump that switches 12 volt power from the battery to the pump through a different harness like the 03-04.5 FASS units do.

 

So is it confirmed...the stock pump line only pushes 5 volts?

If that is the case...I am going to get a relay and run my Holley Blue directly off my battery and soon as it warms up.


BTW...to fix the problem above...just switch the FASS relay with the OEM pump +....not the cigar lighter. It should work then.