More dumb questions from Gravy

[Gravy]

Ok, long story short, I'm not the proud owner of a 91 dodge stealth, fuel pump was shot so i replaced it, and without hooking up the fuel return line she started up in about 2 seconds. Ran great and idled perfect. However found the fuel return line wasn't hooked back to the tank. After plugging said line in, i get nothing. Fuel is getting the the engine, plugs are soaked, but it wants to pop over from time to time. But never fires over now. Car comes with a SAFC but what should i set the injectors for, 0% all the way across? Havn't had any experience with one, but i'll be reading up the next few nights. I"ll end up doing a plug/wire change out on it and i know i am getting spark from the plugs and i have compression so

Originally when the car first got a battery in it 1k rpm's was sitting at about 15% and it dropped down from there on the SAFC. Toyed around with it and all the sensors are working from what i can tell. Pump is sealed tight, know it's grounded since i'm getting fuel presure and i'm getting spark so i know that part is good.

Could my plugs just be so fouled it's not getting a strong enough spark to fire it over? Even with my DSM the worlds nastiest plugs would still get the car to fire over more then this thing is... FPR maybe shot? Just seems like i'm getting way too much gas but duno why. Any and all ideas would be great, and i'll probably have a few more dumb questions in the future.

Thx, Gravy

[sleepydsm]

If it has stock injections, shouldn't the AFC be se to 0% across the board for completely stock setup? And obviously negative in the lower RPM range if they are larger than stock injectors. Is your AFPR set right? Maybe the FP is over-running the regulator?

[Gravy]

It is a fully stock set up, and the pump is a 100% oem replacment, not a performance one. So i don't think it's over running the regulator, unless it's bad.

[blageo23]

Have you tried disconnecting the return line again?

[FattyBoomBatty]

Maybe somehow it got flooded. just unplug the injectors/ fuel pump power and crank till it sputters/starts then dies again. voila, not flooded.

[Kevin 1G Drummer]

Maybe the return line is clogged, causing the fuel pressure to be too high? where was it disconnected from before you re-connected it?

[Gravy]

Someone brought the idea of the return line being blocked, it was disconected from the tank it's self, so it wouldn't be any of the hoses. Believe me, it's returning from the engine JUST fine. But doesn't seem to be making it into the tank. The other thing i thought of is there's a little filter on the vapor return line and it is supose to be a one way valve, but it doesn't really work. Anyone think that could be a small cause of it not running, even though that being in or out doesn't make a difference.


It's a Mitsu, so it's had a good 12 hours of just sitting without being flooded, i'm doing the plugs tonight and seeing if that fixes my problem, i'll try a few things some people at work recomended. Duno if anyone has ever heard of a SAFC causing the fuel injectors to be stuck open all the time. I know i havn't, but it wouldn't suprise me if in my tinkering last night at 3am i didn't do something wrong. But i didn't really change anything other the the fuel % at different rpm ranges, put everything to 0% due to the car is totally stock with only 3" turbo back exuahst and cone filter.

Now, unless i'm mistaken a FPR gone bad wouldn't give me this symptoms would it? Gona go out, check to make sure the line isn't clogged, replace plugs and maybe wires depending on their condition, and see if i can find any problem in the engine bay before i crank her over.

I'm not 100% familure with the car, but does the tank need to build pressure in order to work correctly? The old gasket looked fine, wasn't damaged and was actually fairly new looking, but i dunno if the thing maybe didn't seal.

Edit:

Also, does anyone know if the GM Maf translators will work on my vehicle, i've found some that list for the 92-95 or 99 but never list the 91. Just wondering if there's something really different with the 91's compaired to the 92's. I know there's body differences, but i'm more worried about the motor. The body can look so/so for now, i just want to hear this thing pur.

Also, does it makes sense that i'm seeing zero voltage on the SAFCII for the air sensor?

[blageo23]

I was going to say that the return line was blocked. Do you have a gauge to see what the fuel pressure is? a bad FPR could either have there be no pressure or too high of pressure. Also the tank doesnt have to build pressure. The EVAP system is the one that wants the gasket there(beside gas not spilling out).

[Shane@DBPerformance]

The Mitsus work off of frequency, so you can't look at the voltage. You can go into monitor mode and watch the Karman Hz. You won't get any useful readings in the voltage test screen.

[Gravy]

New quick little update, i pulled the fuel return line, and gas came out, and was going to blow in it quick so i brought it up fast, put my lips to it, only to get a massive amount of gas to go spraying all over the trunk, my face, and my clothes. So, i figured i'd let this continue, and after my seafoam bottle was full with no stop in sight, i cracked the gas cap and it let out a ton of pressure. The vehicle has been inside, out of the sun all day long, all the lines were hooked up the way they should be.... when i first pulled the lines there was not problem with the tank holding pressure. Anyone know why i'd have so much pressure in the tank after so long, and think that it would be enough to cause a problem. Mind you, the gas line was a good foot from my face when i got hit.:fart2: