Car starts, but dies right away...
10-31-2005, 05:40 PM
#1
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Location: MN
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Ok guys I need to get this car running so if anyone has suggestions please post them. I'm running a S5 B-Type REDOM RE-Amemiya stock N374 ecu and stock jspec S5 TII harness in my TII with no emmissions. Basically all I have plugged in is CAS, TPS, water temp, air temp, Afm, injectors, boost sensor, and thats all i believe off the ecu harness. I am using a S4 TII boost sensor, so if thats a problem somebody let me know. Heres what happens: I can get it started. It idles nice and smooth at 850rpm's for about 8 seconds, then sputters and dies. I cant narrow it down to the problem. I used the afm before i went haltech and it worked fine, so i wouldnt think it would be bad, and the boost sensor is S4, but it plugs in and i figured it has the same guts as the S5 one. Any help would be greatly appreciated.
10-31-2005, 07:17 PM
#4
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the fuel pump is hooked up to a switch since the fuel pump wiring was changed when i went to a haltech, so its just wired into a switch for now where its either running or not. Come to think of it, i forgot to bolt down the ecu onto its bracket, its just laying under the carpet plugged in. Would this keep the ecu from grounding? could that cause it?
11-01-2005, 08:13 AM
#6
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ok, well that tells me i have the boost sensor plugged into the wrong clip. That just might help. Im gunna try bolting down the ecu, and pluggin the boost sensor into the right plug and see what happens.
11-01-2005, 10:25 PM
#7
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ok, I figured out that i had the pressure sensor plugged into the wrong clip, plugged that into the right one, and made sure my ecu was bolted down onto the bracket, since it was just laying there before. I can get it to start if i have someone hold the plunger in on the afm, and I can keep it running as long as i want with a nice idle, as long as i hold the plunger in. I can rev it up, but when it hits 0 vaccume it hesitates and pops, like it richens up a ton. If i let the plunger out, it just dies. I propped the plunger open and backed it out into the driveway, and tried to drive it back in, but as soon as i would hit zero vaccume pulling up the driveway, it would pop and hesitate and die on me. My question is, is this a AFM problem? Does this mean my afm is no good?
11-01-2005, 11:16 PM
#8
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Location: Savannah, Ga
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You have a vacuum leak. That explains having to hold down the AFM plunger for it to run right, as well as the starting and immediately stalling. Recheck all the vacuum lines and plugged vacuum fittings.
11-02-2005, 07:38 PM
#9
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checked everything for a vaccume leak except for the lower intake manifold. I was able to start it and keep it running by holding in the afm plunger like before. but it still wouldnt idle on its own. Decided to grab a can of starter fluid out of the cabinet and started spraying around the engine looking for a change in idle. I sprayed right above the hotside of the turbo and it almost killed the engine. Got it closer to the bottom of the manifold and sprayed and it killed the motor. Apparently i have a huge leak down there somewhere. Looks like ill be stripping it down to get the LIM off tomorrow.
