Fuel Pump Problems
yup went out today started the car and it ran great,,,,,,,, pffft lol so I let it get to normal temp 190 and I put it in gear, and holding the brake I applied some throttle and I felt that same stumble or seemed like a erratic slight miss, no specific rhythm or pattern to it, and a couple of times it seemed to bog down in park, but the idle came back but my fuel pressure out of both pumps from the hyper fuel was a steady 40 psi, so I am going to install my spare msd coil, and my spare msd distributor pickup, and for the hell of it I will install my spare ignition box, and I will put in a good set of double platinum plugs, the wires are still new also they are taylor 8.8 wires one thing I know for sure is it is a heat soak issue of something, because car ran great at first start the throttle bodies do have a 1" plastic spacers under them, and all the fuel lines are about 2" from any heat source, like the blower case, now once I change out my whole ignition system, and it still does it I will be more than likely going to the avs 1912 carbs, and if so I will be very disappointed in the fitech sys, I have about $3000.00 in it total so far in the whole fuel system, ill let you know what the results are after the part swaps, I am going to start on that tonight........
My "PUMP" problem got fixed with a ground wire to car body and throttle body. This is your ground to pump. Caused my no start problem when battery was slightly discharged,like using winch. Worked at first then went bad.
To be more clear run a wire to throttle body to body ground. Mine had pump ground to frame this was not sufficient. Have seperate frame and body as in Jeep.
my prob ended up being a o2s but I will put a ground on like that this system loves grounds.
Hi, did you ever get to remedy this problem, or did you just chuck it for a carb? I have a 1970 Fairlane (Australian) with a roller 302/Cleveland heads fitted with a fitech 30005, purchased new in 2021 and fitted in 2023, and has never been out of the shed with the exception of driving in and out. This unit has an intermittent problem of the in line fitech fuel pump starting up, it is hit and miss. I have checked all of the voltages, connections, fuses etc, all good, seems to be the ecu to me, and fitech hasn't been very helpful, in fact their last recommendation was to install a relay and bypass the ecu!
Quote from brian58 on October 11, 2025, 12:05 amHi, did you ever get to remedy this problem, or did you just chuck it for a carb? I have a 1970 Fairlane (Australian) with a roller 302/Cleveland heads fitted with a fitech 30005, purchased new in 2021 and fitted in 2023, and has never been out of the shed with the exception of driving in and out. This unit has an intermittent problem of the in line fitech fuel pump starting up, it is hit and miss. I have checked all of the voltages, connections, fuses etc, all good, seems to be the ecu to me, and fitech hasn't been very helpful, in fact their last recommendation was to install a relay and bypass the ecu!
the Fitech Easy Street 600 ( 30005) had problems with their ECU's failing. Issues like poor soldering, faulty chips, and users using cheap China made Fuel pumps that drew high amperage and would kill the ecu even though the fuel pump circuit had a inline fuse. The first gen ECU's you have to install a relay for the fuel pump and have the Fitech trigger the relay due to hi amperage fuel pumps or go with a quality Walbro 255 litre pump that draws only 7 or 8 amps compared to the cheap Chinese pumps that draw 14-15 amps which is the max the fitech ECU can power. Or upgrade the ECU to gen 2 of the ECU.
Thanks for the response, the fuel pump is a Fitech 50101 inline pump, I suppose it still could be a "Cheap Chinese Pump" though!
Quote from brian58 on October 14, 2025, 7:32 pmThanks for the response, the fuel pump is a Fitech 50101 inline pump, I suppose it still could be a "Cheap Chinese Pump" though!
It is a Chinese made fuel pump and not good quality. Find a 255 lph Walbro inline pump or better still get a Tank's Inc fuel tank with intank pump. That is what is in my car and have no issues with the Walbro pump or the FiTech TBi since 2017.
I have decided to ditch it and fit an Edelbrock 1406, I don't trust the Fitech. There is no Tank's Inc fuel tank to suit an Australian made 1970 Fairlane, these are totally different to US made cars. This car has never been driven on the street, in fact the engine hasn't even been run for very long! Thanks for the info.