XF/ZL EFI 250 questions

[bear351c 10,271]

1. Has anyone fitted an aftermarket Air Flow Meter, or had one rebuilt.? There was a company called Injectronics doing this sort of stuff, they still around?

 

 2. Fuel pumps are around $200, is there an aftermarket equivalent.? Bosch 044? (Not after a cheap chinese knockoff)

Just an in-tank pump with similar flow rate.

[gerg 10,871]

You can use any pump that you can physically fit in the cradle, as many modern pumps of similar flow/pressure are smaller in size. XPTCossy fitted a Walbro to his Supra and was both shorter and smaller in diameter. Hose clamps are your friend.

 

What exactly is wrong with the current AFM? If the contacts are worn out on the potentiometer, you can bend the little arm to run on a fresh bit of the carbon resistor.

[bear351c 10,271]

Not too sure. Just having trouble starting the ZL. Cranks over way too many times. Looking for options, is all.

Changed leads, plugs, ign module, cap & rotor. Tried 3 different octanes of fuel. Changed the air filter. Cleaned the throttle body.

yada, yada, yada..........

 

Always starts, runs well, drives ok, never stalls. Some days it doesn't fire until cranking 8-10 times, other days, it kicks into life on the 2nd crank.

 

6 cylinders do my head in.....

[Thom 6,651]

Fuel pressure reg may be on it's way out and letting the fuel rail drain when it sits, try flicking the key on and aff a few times to prime the fuel system and see if it starts straight away

[bear351c 10,271]

Hmmmm....... good point. It does prime when you turn on the ignition, and I always wait 2 seconds before cranking her over. Is the fuel reg hanging off the rail, somewhere??  Can they be refurbished?? Are they still available from FoMoCo.??

[Thom 6,651]

Not sure about x series but e series they are mounted on the fuel rail on the return side

[Mr Polson 10,214]

They're at the back of the rail on xflows.

Can grab a pic if I have one on my spare EFI stuff.

[SLO247 1,713]

Should be able to get aftermarket.

[bear351c 10,271]

Air flow meter or fuel pump, mate?

[SLO247 1,713]

Pressure reg.

[Lord_fahrquhar 2,580]

gss342 walbro for the pump.  reg is 18 bucks from ripco.  and fuck the arm off and run a megasquirt or el ecu with j3/quarterhorse.

[gerg 10,871]

Yeah heard of that, allows MAFless tune but is a bit involved in the wiring department. Eliminates the biggest bottle-neck in the system though. Also lets you do a cold-air into the throttle body instead of the BBQ it gets going over the exhaust.

[tpak addict 1,909]

if you want to try another AFM I have a spare one if you want to check if its that....

[Lord_fahrquhar 2,580]

yeah i got a spare afm too.  for nostalgia's sake.

[tpak addict 1,909]

and fuck the arm off and run a megasquirt or el ecu with j3/quarterhorse.

 

or could go EA2 ecu (no smartlock) and engine loom

[Xelisty 366]

After I put my surge tank / second external boot mount pump in my 250, it starts after 1 second be it sitting for one day or 1 week. . With the one pump before it would take 2 to 8 seconds cranking depending how long it sat for. Not a cheap option but made a good difference.

 

 

Sent from my iPhone using Tapatalk

[Lord_fahrquhar 2,580]

or could go EA2 ecu (no smartlock) and engine loom

 

yeah or this.

[bear351c 10,271]

Or buy a new battery every year...........

[bear351c 10,271]

The Walbro 342 available in shops, or online.?

[XPT 673]

I bought my Walbro gss342 online, shop around. I got mine for $110 from memory

[bear351c 10,271]

Yep, just found some online. $115.  (Also some Walbro knock-offs for 60 bucks.)  Cant show links anymore, or photobucket, "upgrade to Windows 10" they said, "it'll be fun" they said, I just got Microshafted.   So, I reckon I'll get a Walbro and new fuel Reg. 

[bear351c 10,271]

Just ordered a Walbro GSS342, and might as well change the EFI regulator while I'm at it. Anyone know what pressure the EFI Xflow runs??

80-100psi.?? Will get an adjustable, just wanted to know what working range is needed.

 

Does anyone know if the fuel rail is at full pump pressure, and the pressure is regulated back to the tank? Or is it regulated before the rail?

 

Cheers.

[SLO247 1,713]

I have the genuine manual if you want me to have a look?

[gerg 10,871]

Should be full pump pressure to the rail, then regulated and dumped back to tank. That's what the reg is supposed to do. Only thing between pump and rail should be a filter.

[bear351c 10,271]

I have the genuine manual if you want me to have a look?

Could ya, Dan?  Got a blue one here.............somewhere.!!   Cant bloody find it.

 

Should be full pump pressure to the rail, then regulated and dumped back to tank. That's what the reg is supposed to do. Only thing between pump and rail should be a filter.

Thanks Gerg, that's what I thought.  Reminds me, haven't changed the filter.......Bugga.