I went to check out an sr'd 240

[freakyjason]

Before i begin, id like to say that i have just recently taken interest in the sr motorset. i dont know TONS about it, but i do know enough to know when something is not quite right. Anyway, so i go to test drive this s13 hatch (91) with an s13 sr red top with around 50k on the motor. The car looks pretty good, well maintained but the engine continuously stalls when idling. Like when you put in the clutch to roll to a stop, the rpms just dropped and it would shut off. This would not happen however if you pumped the gas a little. He said it only does that when its hot out (which it was VERY). He had one of those safc II things and he was attempting to give it more gas in the mixture but to no avail. He also mentioned that he had never had the car tuned after the swap was done. I figured that this was the culprit. He wanted a very decent price for it and I was wondering if you guys would risk it. I would build my own sr'd 240 but this is cheaper and I dont think I have enough mechanical know how at this point to swap an engine. I searched and didn’t find too many definitive answers. Anyway, let the flaming begin!

[nwmrkt]

i would do the swap myself...there are lots of walkthroughs and people here are willing to help, im the end it would satisfy you more. As for the stalling...its probably because of a atmospheric blow off valve and he has no engine management for the fuel changes. (correct me if im wrong).

[Onizuka]

Yeah, if there are any modifications to the fuel or air metering system, wideband o2 tuning is heavily recommended.

I cant really comment on weather you should buy it because there is no price and no pics. Don't take his word for it that there is only 50K on the motor, that is almost never verifiable (seems like every person got their sr with only 50,000 miles on it ). Go with what condition the motor is in, look for wear on the cams, blue or white smoke in the exaust (however faint), odd noises, etc...

[nismofly]

sounds like it needs a recirculated bov

[nwmrkt]

Yeah, if there are any modifications to the fuel or air metering system, wideband o2 tuning is heavily recommended.

I cant really comment on weather you should buy it because there is no price and no pics. Don't take his word for it that there is only 50K on the motor, that is almost never verifiable (seems like every person got their sr with only 50,000 miles on it ). Go with what condition the motor is in, look for wear on the cams, blue or white smoke in the exaust (however faint), odd noises, etc...

"wideband 02 tuning"? what is that? safc?

[GTS4-R]

is there a bov vented to atmosphere? that could cause it to stall

[Onizuka]

"wideband 02 tuning"? what is that? safc?

When you go to a dyno at a tuning shop, they stick a wideband o2 sensor in the tailpipe of your car to measure air-fuel ratios. You then use that data to adjust your fuel map with a fuel controller, such as the SAFC. Its amazing how many people neglect this, for $50-100 you could walk away with an additional 80hp at the wheels, I know I did.

[nwmrkt]

when I swap in my sr....would you reccomend something like a safc to tune? I wouldnt need something like hte power fc to get my car running right, the safc is fine?

[nspjosh]

I have a toda 10lb flywheel and exedy stage 2 clutch which causes my car to idle off when I pop the clutch in to come to a stop. If I let the rpm's drop slowly it won't cut off, only when I pop the clutch in it cuts off. This could be the case if he has a lightweight flywheel on it, but I dunno, just giving my 2 cents. You might want to test drive it again and see if it will stay on when you ease the rpm's down versus jamming the clutch in.

[freakyjason]

is there a bov vented to atmosphere? that could cause it to stall

I have no clue what this means. The setup didnt look unlike any sr's ive seen. just looked like a standard redtop to me. Anyway, I did try easing down the rpms like nspjosh suggested and it did it regardless. However, even if that did help, i dont want to own a car where you have to drive it a certain way otherwise its a stalling piece of crap. I have decided that there will be other sr'd 240's out there and that this one isnt for me. thanks for the input though guys!

[nwmrkt]

did it "pshhhh" when you let off of the throttle?

[adrianfromthecastle]

I'd say its either the atmospheric BOV or its the mafs thats causing the stalling.

[Bumnah]

dieing at idle can't be the bov. you're aren't boosting for one. my car ran fine with my RS completely loose. maf sounds something i would search more.

do a compression check and drive the motor hard, and look for oil/coolant/boost leaks. look for smoke look for odd noises. if the idle is the only problem you can fix it without too much trouble. and some searching online. i'd do it if the price is right. if you got the patience buy a stock 240 and buy an sr. this thing sounds pieced together and half assed.

[freakyjason]

Yes, it made a "pshhh" sound when i let off the gas. I did drive it kinda hard. it pulled really nice for a stock sr. Id say mafs is going in the right direction. ill mention it to the guy and see if he can borrow a maf from a buddy or something so i can come down and test drive it again with the new maf.

[IDriveFords]

I put my money on the SAFC being programmed wrong. He's probably got all the settings messed up. An easy way to fix this (if you buy the car) would be to disable the SAFC and route the vacum lines so it'll be running at stock boost (around 7psi without the solinoids). I have an FMIC, intake, bov, exhaust and a bunch of other upgrades and my car constantly boosts 8psi with no tune and no safc. I would do as the others suggested and ask him if you can run a compression check. If you don't know how to do it then ask him if you can take it up to a shop and let them do it. If he's confident the motor isn't screwey he shouldn't care. BTW a great deal on this cars would be like $4k to $5k with a properly functioning swap. If the body is in great shape it may be worth it to pay a little more. See if you can't talk him down since it seems to have problems.