Ok, Now That I Got My Lt1 Injectors Put It, My Car Wont Seem To Start, I Replace Vacuum Lines, Checked ALl Fuses, Checked ALl COnnections, And My Car Still Wont Start. It Turns And It Feels Like It Wants To Start Up, But It Dont. My QUestion Was, Are The Connectors To The Fuel Injectors Like The SPark Plug Wires, That Have To Be Connected TO RIght Cylinder To Get THe Right Firing Order? Or Is THer ANything I Might Of Overlooked? Thanks GUys

 

You don't need to capitalize every single word.

Sounds like you installed injectors without reprogramming for the increased flow rate - running rich. Does it start if you do a clear flood start?

 

Lol sorry, it wont start period, yeah it will turn, and it wants to start but no luck, now how do i do a clear flood start?

 

Mash the gas to the floor while you crank it over. If it starts, you're probably getting too much fuel.

 

Oh, I tried that already, and no luck, u think the connectors might be in the wrong injector?

 

no luck here, guess ill look for somewhere else, thanks

 

Make sure the wires are attached to the correct injector first off. Are these new injectors or old ones? If the are old and have been sitting around a month or so they could be gummed up. You may be rich since you are using bigger injectors but it sounds like something else is going on.

 

Ok, finally got it running! i guess there wasnt sufficient fuel in the gas tank in order to feed the injectors, but then again it wasnt empty. but now the car is idling bad, anything i might of overlooked, or needs to be changed?

 

Assuming you have all the injectors installed and plugged in the correct order, and also assuming the car ran fine before the switch I would look into two things.

1. one or more injectors malfunctioning due to being gummed or clogged, possably due to sitting for an extended period of time.

2. the car is running rich due to the injectors allowing more fuel to be delivered per pulse as compared to the old injejectors.

While the engine is running try unpluging the injectors 1 at a time and see if the car runs worse. If you unplug 7 of them and the car runs worse and the 8th one makes no change than that is probably the one that is giving you the problem.

If you have anyone who can check your car with a wideband o2 meter to see if it is running rich in which case you would need some tuning.

Good luck

 

Ok when ur talkin about the correct order, do u mean like correct firing order? cause i didnt know they went by order :-( and my old ones really made my car run rich, but these are a bit better :-) And Now im getting a code 33 and 44 but i replace my maf a year ago, and my o2 sensor like 6 months ago. DO you think i need to replace it the o2? and how would i be able to tell what order the injectors go?

 

Sorry it took so long to get back to you. I did not mean to confuse ya on this. The injectors do not have any spacific order they install but the harness connectors are numbered(at least on my LT1). Just make sure the connectors are in the correct order, number 1 connector for number 1 injector etc. I never did ask what size injector you started with. I think the stock injector size for 305 is 19lb and 350s use 22lb. As far as the codes go I would check with a tech or someone with the capability of testing the maf and 02 sensors. Do you have an aftermarket chip in the computer? Has your car ever been tuned with a new chip? If everything is working ok, plugs,wires,cap/rotor,sensors,etc then I would think the problem lies either with the injectors or computer tuning. If the injectors have a clog or are gummed up from sitting it will affect the fuel mixture. If the injectors are larger than the programmed value the computer thinks is in the car it will run rich. If during your checks you find the MAF is not reading correctly this can also cause some issues. If the wires in the maf are contaminated with anything, like oils from a k&n air filter or any other aftermarket filter that uses oil it can cause the computer to not read the airflow correctly. Before you change it if you think it is bad get some electrical contact cleaner (radio shack,parts store) and spray the wires on the maf to clean them. This has been found to work if the wire are contaminated. Alvin from pcmforless could help you with the tuning(chip) if you need that. Good luck.

 

On a TPI, all the injs fire at the same time. Doesn't matter if 2 inj wires are crossed. When I installed LT1 injs, I noticed they were a little shorter than my original 22 lb'ers. I didn't have a problem, but I've heard others had to mill down the fuel rail supports so the fuel rails would sit a little lower. If the injs don't extend into the intake far enough, you'll have a vacuum leak.

 

I did not realize this set up was a batch fire. Sorry for the confusion on my part. My LT1 is numbered. I took for granted his was also.

 

But if the fuel injectors didnt extend far enough wouldnt i be able to smell gas? And if my k&n's are dirty is there any way i might clean out the maf? or should i use the regular electrical contact cleaner?

 

Depends on which end comes up short.
If the inj doesn't go far enough into the intake, you'll have intake vacuum pulling the fuel into the eng along with extra air. I doubt if you could smell that.

If the inj doesn't go far enough into the fuel rail, you will have a very noticeable fuel leak. This shouldn't happen if you used the little clips that hold the injs into the fuel rails (and the o-rings are good).

The important part of the MAF is self cleaning, so unless it's just nasty, I'd leave it alone. Never tried cleaning solvents on one. Sounds risky.