PROBLEMS: running too rich

[neilsan]

Square root old vs new fuel pressure? what?

Installing a walbro pump with no other modifications to the fuel delivery system will not increase the fuel pressure. At a celing of say 60psi, a walbro can still maintain 255lph, but that doesn't mean it increases the fuel pressure to a figure over that which is set by the stock regulator. at all.

OP- I did read your original post. I know you bought it for your SR. There is no reason to. You should just find a stock SR MAF instead of using an AFC to gimp a Z32 MAF install. Get rid of your AFC, or else your SR will run like shit too.

[HS13KLS]

Originally Posted by neilsan

Square root old vs new fuel pressure? what?

Installing a walbro pump with no other modifications to the fuel delivery system will not increase the fuel pressure. At a celing of say 60psi, a walbro can still maintain 255lph, but that doesn't mean it increases the fuel pressure to a figure over that which is set by the stock regulator. at all.

OP- I did read your original post. I know you bought it for your SR. There is no reason to. You should just find a stock SR MAF instead of using an AFC to gimp a Z32 MAF install. Get rid of your AFC, or else your SR will run like shit too.

well when i have the money i will invest in an AEM. and get a map.
but right now. i dont.lol

or i can run a mega squirt that i have...i just need to wire it up. but then i need to get a ford edis off of a junkyard car.

anyways. but i dont think you get what i am saying

it happened a few days ago.
(when i originally wired it up. i never put back on that kick panel. so my wiree/ecu were exposed.) i told passengers to watch out and NOT kick my ecu

well im sure eventually my girlfriend mustve kicked it. and i thought she may have messed up some of the wiring. but i re did everything. but still nothing.

basically my car has been running REALLY WELL since before a few days ago..so its not like anything i have put on my car has ruined it. somthing happend..i am trying to troubleshoot

[neilsan]

Originally Posted by HS13KLS

anyways. but i dont think you get what i am saying

I don't think you get what I'M saying. The AFC is obviously the cause of the problem, so remove the cause of the problem! Whether or not some wires got kicked is totally moot because an AFC doesn't do any good even when installed right.

Ignition timing is determined by engine load. Engine load is calculated with MAF and TPS voltages plotted against RPM. Therefore if you mess with MAF voltages you fuck with ignition timing and that's significantly more important than trying to richen the A/F mixture for a fraction of HP. It's also the WRONG way to "trick" your ECU into running a Z32 MAF. I didn't say get AEM standalone management, I said get an SR20DET MAF.

You probably spent like $300 on the AFC and are probably butthurt about hearing they're worthless and don't want to get rid of it cuz of the money you spent. I really understand. I'm sorry you bought into the marketing but you have to understand that you're really, really better off without it. You can probably sell it for at least $280.

[UNISA JECS]

Originally Posted by neilsan

Square root old vs new fuel pressure? what?

Installing a walbro pump with no other modifications to the fuel delivery system will not increase the fuel pressure. At a celing of say 60psi, a walbro can still maintain 255lph, but that doesn't mean it increases the fuel pressure to a figure over that which is set by the stock regulator. at all.

OP- I did read your original post. I know you bought it for your SR. There is no reason to. You should just find a stock SR MAF instead of using an AFC to gimp a Z32 MAF install. Get rid of your AFC, or else your SR will run like shit too.

A walbro 255, Z32 TT, Q45 fuel pump installed on a S13/S14 will bump up the fuel pressure only becasue the stock FPR wasn;t designed to bleed of twice the amount of fuel it see's with these pumps.

The Z32 and Q45 have a mechanism to control the over running of teh stock FPR, its called a FPCM fuel pressure control module and it restricts the voltage to the fuel pump down to like 8 volts which greatly reduces the amount of volume teh fuel pump pushes during idle and cruise. I have first hand experience on more than 15 cars with any combination of the pumps I described and used a fuel pressure gauge to read the pressure and a volt meter to see teh affect voltage has on fuel pump output.