i think my injectors are leaking [help]

[B-rad Smizzel]

i just got over spark issues and now i think that my injectors are leaking i have a 1995 s-14 with top feed injectors aftermarket fuel pressure reg and a custom fuel rail yesterday my car was spuddering and cutting out and running rich so i let it sit all night put new plugs in it and it barely started but it did and ran and pulled just fine no spudder or cut took it home and let it sit for about a half an hour and it wouldnt start so i let it sit for ten hours then i primed my fuel pressure up and looked at my gauge it went from 40 to 20 psi in about 60sec pulled my plugs smelled like gas and plugs were wet

[WDRacing]

i just got over spark issues and now i think that my injectors are leaking i have a 1995 s-14 with top feed injectors aftermarket fuel pressure reg and a custom fuel rail yesterday my car was spuddering and cutting out and running rich so i let it sit all night put new plugs in it and it barely started but it did and ran and pulled just fine no spudder or cut took it home and let it sit for about a half an hour and it wouldnt start so i let it sit for ten hours then i primed my fuel pressure up and looked at my gauge it went from 40 to 20 psi in about 60sec pulled my plugs smelled like gas and plugs were wet

Dude...this is a tech forum. Use grammar...even a little is better then none. Like maybe some caps and a period or 4. Take the time to communicate what the problem is and we'll take the time to help you out.

[PyR0NiAk]

seems like you have more problems than me... Didn't you just post a problem with your condenser fan staying on too?? Try changing the o-rings on the injectors...

[WDRacing]

He has top feed injectors, they don't have orings. We need the enitre setup listed in order to help, ecu, engine management, maf, turbo etc.

How else can we possibly troubleshoot.

It's like me saying, I have a weird noice, what can it be? See my point? Slow down, type a rational thought and make it understandable. That's the key to communication.

WD

[B-rad Smizzel]

ya sorry about wrighting like a crack head im just stressed out about my car not running when i just got it payed off. my car is a 1995 s-14 with a ams crate engine, gt32 turbo(14psi), stock ecu, apexi s-afc II, z32 mas flow air senser, distributor is stock with no coil, aeromotive fuel reg, and i dont know the injectors the car came with mods

[B-rad Smizzel]

so i let my car sit for two days and to let the cylinders dry out and just went out and started it right up real quick. when i started it i went back to my muffler to see if it was running rich and their was little black water drops coming out my muffler than i let it run for a little bit and turned it off and before i could get around to look at my fuel pressure it already droped from 40 to 22psi ???? let it sit for a minute or two started it agin and it took a little longer

[silverkaturbo]

ya sorry about wrighting like a crack head

This is priceless.

[480sx]

^^ Dude this is B-rad Smizzel.

Alright, first of all. If your car is running like you say, it is most likely running pig rich. In addition, you have fresh rings that arnt seated yet. This is THE most frightening and one of the most dangerous situations for a new motor. Basically, because your rings havnt sealed fully with the cylinder walls the engine will see a very high level of blowby.

Basically, gas gets into your oil QUICK, and ruins your motor if your running rich on new rings. Pull your dip stick. Smell it. If it smells like fuel AT ALL, change it.

Get the car running. Pull injector plugs one by one with the motor idling, replacing them after you pull each one and leave it unplugged. Your looking for the following by doing this test. An injector plug that, when unplugged does nothing or little to change the idle of the motor. That indicates you have a leaking injector or rail.

Otherwise, unplug the maf and see if the car runs ok. Could always be maf lol, i didnt really read what you wrote.
Modified by 480sx at 3:01 PM 8/2/2009

[Chris28]

You dropped the cash for an AMS crate engine but only got an SAFC for tuning? Get a real tune for your MAF and injector size then start troubleshooting. I'm betting your problem is in your lack of tune.

[B-rad Smizzel]

tha

^^ Dude this is B-rad Smizzel.

Alright, first of all. If your car is running like you say, it is most likely running pig rich. In addition, you have fresh rings that arnt seated yet. This is THE most frightening and one of the most dangerous situations for a new motor. Basically, because your rings havnt sealed fully with the cylinder walls the engine will see a very high level of blowby.

Basically, gas gets into your oil QUICK, and ruins your motor if your running rich on new rings. Pull your dip stick. Smell it. If it smells like fuel AT ALL, change it.

Get the car running. Pull injector plugs one by one with the motor idling, replacing them after you pull each one and leave it unplugged. Your looking for the following by doing this test. An injector plug that, when unplugged does nothing or little to change the idle of the motor. That indicates you have a leaking injector or rail.

Otherwise, unplug the maf and see if the car runs ok. Could always be maf lol, i didnt really read what you wrote.

Modified by 480sx at 3:01 PM 8/2/2009

thanks thats all i needed was how to diagnose it i will try it tomarrow and let you know

[B-rad Smizzel]

You dropped the cash for an AMS crate engine but only got an SAFC for tuning? Get a real tune for your MAF and injector size then start troubleshooting. I'm betting your problem is in your lack of tune.

ya this car has been nothing but trouble since i got it bc two winters ago i blew my motor and i had ams (chris) tune my s-mfac and it ran like a dream till now

[Chris28]

What did you change before it stopped working? I still suggest getting an ECU tune, they are much more reliable than an SAFC tune.

[480sx]

From reading your post it just sounds pretty obvious you have a leaking injector or blown o-ring.

[B-rad Smizzel]

now i feel really dumb bc i pulled off my injectors and primed my pump no leaking. so i was looking at all of my wireing and my water temp wire was loose pushed it and it ran better and i think that was it thanks for everyones help

[eazye2000]

Ah yeah. That little sensor will throw any KA into a fit. The coolant temp sensor is a finicky little bastage.

Good find. Glad it worked out for you.