intermiten starting!! help!!

1sick91tsi · 02-26-2006, 08:51 AM

to start out i just finished my rebuild, ok so my car will start and run great one second, the next it just wont start. it will start just fine several times in a row the next it just wont start, it cranks over but doesnt start, when it doesnt start the plugs are all bone dry, also the fuel pump never turns off when it wont start. like usually it will turn on the shut off after a few seconds but it just stays running. when the car starts the thing runs great no problems, idles great revs up great no problems. also the car was sitting for about say 8 months with a quater tank of gas so i put about 7 gallons of 116 in it. also when it wont start for me if i put some starting fluid in it it starts right up and runs great. if you need more info let me know here are my mods, 20g turbo, 2g throttle body elbow,full 3' magnaflow exhaust, test pipe,, dejontool intake pipe, magnecor plug wires, k&n air filter,2g maf, 550cc injectors, tmo stage 2 chip compenate for 550s, turbonetics extranal gate, 2g ports ex.manifold, halman boost controler, fluidyne rad, slim line fan, slow boy front mount with short route piping, crushed 1g bov, 2g o2 housing, s-afc, data logger, autometer egt gauge and boost gauge, 6-bolt, 2g pistons .20 over, clevitte bearings, arp rod and main and head bolts, no balance shafts, mitsu 4 piece head gasket. thanks for all the help guys!!!!!

Old Mitsu Tech · 02-26-2006, 12:54 PM

Well, you just told us it's fuel related. Good. When it won't start, see if you have fuel pressure. It's a pain in the ass to do this, as you need the tool to put inline. Field test by loosening the filter upper nut to see if fuel sprays out.

If it sprays out, check the injector harness to see if it has 12 volts on it key on engine off. KOEO. If it does, put your test light on the positive post and crank the engine while probing the negative terminal of your injector harness. Winking light is good. Steady on or off means injector drive circuit is bad. Just find out if it's pressure related. Pump, or distribution related. Injectors or pcm.

Let us know.
Good Luck

1sick91tsi · 02-26-2006, 02:38 PM

ok, well it has fuel pressure, i took the return line off of the regulator and it sprayed out when i cranked the engine. now as far as checking the injectors, the one side is lit when i turn the key on, now are you saying when i crank it the other side should flicker? thanks so much for the help. oh also now, number 2 and 4 plugs are getting wet from cranking it and they all still have spark.

GVR4592 · 02-26-2006, 03:09 PM

Check the caps in your ecu, I bet they leaked.

Old Mitsu Tech · 02-26-2006, 03:12 PM

I agree with the cap thing. Hook your test light to the POSITIVE post of your battery. Probe the wire that does NOT have 12 volts to it. Have someone crank your engine to see if it flickers. No flicker or steady ON or OFF light will mean injector drive circuit which comes back to the PCM.

Just checking.

Good Luck

1sick91tsi · 02-27-2006, 08:43 AM

ok well only number 2 and four cylinders are flickering, and it takes a couple cranks to get them to do it and its very faint. so i dropped my ecu off this morning and got it back already with new caps, they looked it over said that there wasent much corrision a little bit if that. tried it after that and still no better. so what do i need to do, get a new ecu or send it out to be fixed? Or does the injector drive circuit lie somewhere other then the ecu? thanks so much for the help guys

1sick91tsi · 02-28-2006, 07:14 AM

anyone?!!