No Fuel To Injectors?

[insanedsm2403]

Hi what's up everyone.I'm putting together a 93 tsi which has been sitting since 05.I had to swap the motor and harness so I threw in a fresh top to bottom rebuilt 6 bolt motor.everything is all together now and it just cranks ans cranks but doesn't start.Now let me narrow this down for everyone.I drained every drop out of the gas tank and put 5 gallons of fresh shell v-power in.I can clearly hear the pump turning on when I crank it over.I have 43psi at the filter and more then enough comes out of the return on the fpr(stock 2g along with stock 2g injectors).there is spark at the ends of the wires and I have 4 turbo ecu's,three of which appear to be in great condition(one motoguys ecu) inside and out and one which does not acctivate the boost gauge or any lights(bad).the car will start with no hesitation on a spray of ether until it dries out.the injectors are not firing at all.the cam angel sensor activates the fuel pump about every complete turn or so but I do not hear the injectors tick with the car shut off and key to on position.I replaced the resistor pack with one known to be good and still nothing.it just gets really hot.The harness was cut for an afc but I fixed those connections now.Which brings me to my ultimate question?WHY ARE MY INJECTORS STILL NOT FIRING!!!!!!!!any help would be greatly appreciated.I've spent a lot of time and money on this car and I want to drive it!thanks for any help or addvice

 

[tunethis]

Have you tried grounding atleast one of the injectors to see if it will spray fuel why cranking? I know you have 4 ecu's but, it's worth a try. Maybe the ecu's aren't grounding the injectors. Just a thought.

 

[insanedsm2403]

Haven't really ever heard of this grounding injectors proccedure.how would I go about doing this test?

 

[insanedsm2403]

Also I forgot to mention that I did a ghetto test on the injector conectors with a test light.(all I have availible at the moment)no.1 injector seems to be getting more power then any other.when I hook it up it lights up and beeps on no1 injector connector.now I go to 2 3 4 and it only lights up no beep.either way no injector fires just thought this would be useful for anyone trying to help.and at this point I NEED HELP PLEASE!any good suggestions would be greatly appreciated.

 

[fastasseclips95]

Could the Injector Resistor Box be an issue with his problem? Someone with a little more knowledge chime in please.

 

[Griffeclipsed98]

the cam position sensor sends the pulse signal to the ecu for the ignition and injection squence, i have never heard of it turning on the fuel pump. when you turn the key on the pump should run regardless if the motor is turning over or not, try removeing the cam position sensor and free spinning it with a test light on the injectors this will tell you for sure that you are getting a pulse and also if it fires int the corect sequence outside cylinders first for top dead center then the center 2 cylinders. give that a shot. ohh yeah just mark the orginal spot on the head and sensor to keep the timeing set the way it was, before you remove the sensor.

 

[insanedsm2403]

Thanks for the help.I was just about to ask about the cam angle sensor.I removed it turned the key to on postion and spun it by hand.the fuel pump activates about every full turn or so but the injectors are not clicking which a friend of mine said they should be doing during this test and should be easily audible.is this true?

 

[Griffeclipsed98]

yes. the light should flash on and off while turning the sensor. (im not sure what type of tester you are useing but if its suposed to beep to indacate proper voltage then im asumeing yes) your fuel pump should not be effected by your cam sensor it should come on when the ignition turns the ecu on and stay on tell you have pressure then shut off then come on and stay on when you start the car. i'm not sure if a pulse from the cam angle sensor trigers the pump to come on. i always thought it was a pressure sensor befor your fuel return line

 

[insanedsm2403]

Thanks again but I'm almost positive on a 1g its a no prime system which means you must crank for the pump to turn on but this isn't the point here.looks like I'll be hunting for a cas on Monday since I have off work.

 

[tunethis]

Thanks again but I'm almost positive on a 1g its a no prime system which means you must crank for the pump to turn on but this isn't the point here.looks like ill be hunting for a cas on monday since I have off work.

This is true, the 1g pump does not come on unless a signal from the cas is present. I had a no start issue with my car a few weeks ago. When I pulled the cas and turned it, the fuel pump came on but, I did not hear the injectors. I sprayed some starter fluid into my throttle body and the car tried to run. That's how I knew the car wasn't getting fuel.

This is what I did to ground one of the injectors. I first took a volt meter and verified I was getting 12 volts to the injectors. After seeing 12 volts, I lifted the fuel rail up just enough to get one of the injectors out of the engine. First, I took one of the prongs from the volt meter and stuck it into the ground wire on the injector. Then, I took an alligator clip and clipped one end onto that prong and the other end I ground to the car. I had someone crank the car while I grounding that injector and fuel sprayed out of it. At that point, I narrowed it down to the ecu. I replaced it and now my car is running.

That may not be your issue but, it's worth a try.

 

[insanedsm2403]

Alright ill have to try that.I really don't think its the ecu I mean I have 3 good ones and one of them is a fresh motoguys.they all look pretty good on the inside no leaky capacitors or melted boards.I did try to test the cam angle with a test light in the injector pigtails,key in on postion,and when I spun the cas although ver faint I'm pretty positive I saw pulsing.I now think the cas won't solve my problem but I'm still getting a know working one tomorrow just to see.If the cas isn't my problem I'm left clueless!

 

[Tsi talon11]

I need help with that also.I have power at my ground wires on all injectors.I tryed jumping the injectors off but no luck with fuel spray.

 

[ilco187]

try another mpi relay box or either see whats going on with it.

 

[papastalon]

Sounds like injectors are clogged, since they been sitting since 2005. Lightly taps on them while they are being powered up. I'd recommend unbolting the rail off the manifold with injectors still installed to clearly see the injector's nozzles.

 

[rush2252]

Sounds like injectors are clogged, since they been sitting since 2005. Lightly taps on them while they are being powered up. I'd recommend unbolting the rail off the manifold with injectors still installed to clearly see the injector's nozzles.

I bet you played with matches as a child as well?

Dont do this its a good way to burn your shit down. Ive never seen 4 injectors "clog" from sitting. Doesnt happen....

OP your on the right path with the CAS. I understand what he was saying about the ground as well. You should have 2 signals from the CAS and a ground. One pulses coils one pulses injectors. If you can sping the CAS and are getting faint pulse Id say its bad. CAS go bad alot seems like everybody with a 1g has been having this issue as of late

Kolby

 

[rob90eclipse]

ok, simliar problem. Now i only have a 90 1.8l here, which is going to be my daily, but I picked up the car for free with 88k original on it! It's got spark, fuel pressure at the injectors, and car has been sitting for a year. If i spray it, it fires. does this year also have a CAS? Sorry i've only had 2 2gs' (95&99) these are new to me. Any recommendations?

 

[tunethis]

The 1.8 does not have a cas. It has a distributor. Have you checked your ecu to see if it's damaged (capacitor leaks)? A damaged ecu can cause quite a few different issues. I'm familiar with the 2.0's, not so much with the 1.8's. Hopefully, someone else will come in a give you more suggestions.

 

[Rob10_99]

Hey I've sprayed fuel all over the place one time just to see them in action.

 

[herblove]

Thanks again but I'm almost positive on a 1g its a no prime system which means you must crank for the pump to turn on.

Why do I hear to this all the time. My 93 Tsi fuel pump primes when I turn the key to the on position. I have a intank and external pump so I can clearly hear it. Im with trying a new MPI fuse.

 

[Rob10_99]

Why do I hear to this all the time. My 93 Tsi fuel pump primes when I turn the key to the on position. I have a intank and external pump so I can clearly hear it. Im with trying a new MPI fuse.

Correct, it should be a 2-3 second timed prime, then stays running while cranking/running.