Anyone have the problem of the ninth injector not giving enough fuel? I believe this is my problem (rare problem). I have a cold start issue. I have to click the key forward and backward 3 or 4 times to get the car to start, pump enough fuel into the motor. Meaning making the fuel pump kick on and off. Applying pressure releasing pressure to the injector. At first I thought it was flooded out but after running pressure tests I now can say it is a ninth injector not getting enough fuel spray. Only on cold starts. Car runs great. BTW this happened after porting out my upper lower intake and runners. Maybe some deberee went into the injector? OR my other theory (strong theory) please correct me if I am wrong my ECM needs a good old tune. I have a data logger but have not used it yet will that tell me? I can't remember if OBD1 could read on start up. I have no trouble codes. I think I need a tune, Maybe my cylinders fill up with air so much faster that the fuel % air ratio on start up is very lean mixture. Ummmm it's a thinker anyway will the data logger tell me startup readings? I think I need longer pump shoot on startup?? Anythoughs?/ Thanks y'all. I still need to take this bad boy to track see what it runs after my porting and tuning is done.

 

Yea, the 9th injector is not really computer controlled. Dump it. Get a PROM for a 89, and just unhook the 9th...

 

Isn't 89 first year of VATS?

 

I gotta 88 Vette. its there anything i can do to clear it out. like beat on it or something? or maybe i should live with it. So are you'll sure it's not computer controled?

 

Send it in for cleaning and testing. Or just replace it. Maybe it's time to get them all cleaned. Its like $12 each cleaned and tested. Cleaning( car off line 2-4 weaks ) Replace (maybe worth a six pack)

 

9th injectors is NOT controlled by the ECM whatsoever. There is a temp switch on the front of the intake by the CTS that controls the cold start injector and tells it to fire if the coolant temp is under a certain threshold.

I did away with it as soon as I got into chip tuning. Disconnected the wiring harness from it and then just ran an '89 PROM with VATS disabled.

Could also just run an '88 PROM and change the crank injector pulsewidth settings to match an '89 PROM. Personally, I'd just use an '89 PROM because they got the better $6E code and its just changing a single flag for the VATS disable instead of changing a whole table of pulsewidths.

Also might want to verify your fuel pump is pressuring the system correctly.

 

is the temp switch flaky? maybe reset the connection?

So changing the crank injector pulsewidth settings to match an '89 PROM. what will that do? will it dump more fuel in the motor or just disable the 9 th

 

Dump more fuel. If you are going to change the tables, you then disconnect the 9th injector harness.

Honestly, like I said, if you're going to do that, just start with a BIN file for a '89 350. Its a $6E code, I don't remember what the letter designation is for an '89 350 though.

All you do is unplug the injector plug/harness from the injector then.

EDIT: Sorry, this is DuronClocker posting under a friend's account. Forgot he logged in on my computer

 

Ok cool thank man

 

Well I gave the 9th the finger. I popped in a 6e file. WOW well it brang out the freeking monster in my car. My only problem is I can't open the 6e bin in tuner cat. Does anyone have a def file or no of where i can get one for tuner cat???. I tried to modify if but it some of the setting seemed way out of wack because i opened it with a 32b bin def file. So i kept it stock. I'm not sure if i downloaded a stock version or a modifed one from the moates site. BTW VATs what is the vehilce anit theft? if so why should i disable it. i hear all this talk about disabling VATs. Why not let it be, does it cut down preformance??? or is it just because the car wont start???

Thanks everyone. P.S man it really hauls now, it sounds bettter too.

 

Yes, VATS stands for Vehicle Anti-Theft System. The reason you need to disable it is that your car being an 88 isn't equipped with the VATS communicator module that works in tandem with the ecm to either enable or disable the car from starting. I can also say from owning an 89 myself, you're damn lucky you don't have to worry about the VATS garbage besides just deleting it from the chip you're going to use. The only person VATS disables from driving the car 9 times outta 10 is the frigging owner! It won't hinder performance to have VATS at all, but it really sucks when you're sitting in a lonely truck stop parking lot with a car that won't start because the tiny little wires attached to the key cylinder broke, and just don't happen to have all the tools handy to tear the whole steering column apart! All the chicken littles that squawk about disabling VATS being such a bad thing just slay me. Like everybody is hot to steal a 16 year old f body. I figured out a good hillbilly method to bypass mine a couple of years ago, and I haven't had a single starting problem ever since. Sorry for the long rant, but trust me, you don't want to add the VATS albatross to your ride if you don't have to.

 

Ok great so anything refering to VATS disable. Great. What about a 6e def file for tunercat anyone have one i can have? My 32b def file does not have the correct format to open a 6e. Thanks again

 

Anyone know where i can get a 6e Def File? Or do i need to buy one from tunercat?

 

Man I'm having the trouble with my car idling like crap when cold. I have an 88 GTA with a 350 and VATS and would like to find an 89 and up PROM so I can get rid of that cold start injector. I cannot find any on ebay, can anyone help me find a place to get this PROM?

 

are you looking for a bin file? if so go to moates.net/filemon

do you have a check engine light?
sometimes the IAC need a little cleaning up. check for code first though

 

I just bought a 9th injector used off someone on here and installed it, easier then everyone says, I didnt even take off the plenum. Now my car runs great. $15

 

I already replaced the IAC and cleaned the intake and tb.

I am wondering, if I spray a little starting fluid into the intake and start the car cold, I do not have any idling problems at all! How does starting fluid affect the 9th injector? Does the starting fluid somehow confuses the temperature sensor and automaticaly put the car into normal idling mode without the use of the 9th cold start injector?

I'd love to buy a working cold start injector off of someone here if anyone is willing to sell.

 

If you spray starting fuild in any throttle body thats running very lean it will start. My guess is you're 9 th is not working correctly and not dumping fuel in the motor. Unplug it and slap a 6e bin in it.

 

I wish I could slap a bin in, but I do not have a programmer or a chip. I'm still looking for a 89 and up chip for a 350 with an R7 and VATS. No luck so far.

 

check this site out it might help.

http://tpiparts.net/82_92_ecm_and_prom

 

Ahh hell ya, this is the place I wish I'd found 2 weeks ago! Thanks man!

 

Sure man good luck, i think once you call them you can request you're minor chip needs like Vats disable and what not.

 

Just ordered one, can't wait to install it and see how she runs!