I'm working on a 85 vette with tuned port. Someone had changed the intake with one off of a firebird, injectors and all. The guy could not ever get it running right after that. I discovered it had the wrong injectors on it, too small. I ordered some new injectors off of a web site. They called for 22lbs injectors. I have noticed on here that 85 had 24lbs and 22lbs on 86 and later. I know if the injectors are a little small it should still start just not run right. After the injector swap I checked for leaks and was good there. I tried starting the car and it would just turn over and not fire up. I check fuel pressure and it was at 40. Then I pulled the plugs and they were fauled and covered in gas. I grabbed a plug that I had laying around to check for spark, we had spark. I ran to the parts store and got another set, put them in and nothing. The car just continues to turn over. The car ran before I worked on it, but very badly. His digital guages are not coming on also. They normally go on and off while driving. I don't understand why this thing is not running. Please help, thanks! I replaced the injectors with the bosh III style.

 

Wet plugs is a sign of leaking injectors flooding the engine. Too rich condition will never start! Engines need spark and spark at the right time, fuel and air and in the correct ratio and compression in order to start and run. Use a timing light to see if you have spark at the right time during cranking. Use a noid light (available at parts store) or make one with an LED and a series 680 ohm resistor (polarity must be correct on the injector plug) and see if you have injector pulses during cranking. Watch the fuel pressure after the ign is turned off, it should hold up for a long time. If it drops rapidly you may have leaky injectors or a defective check valve in the fuel pressure regulator. I'd even check compression. Also, pull any stored codes. Unplug the MAF and see if it will start, you may also have a defective MAF.
And from you post in the general section, car batteries left sitting for a long time and not kept charged up are door stops. Trying to start a car with a totally dead battery and jumper cables isn't always successful because of the high voltage drop across the jumper cables. C4's won't run below about 10 volts. Put a good battery in place of your dead one. From now on, use a battery tender (trade name) on your battery when you aren't going to use the car for over a month. If you keep your battery charged you will experience normal battery life, letting it sit ruins the battery, even disconnected!

 

Also, check for a large vacuum leak. Introducing "false air" into the engine tricks the ECM into thinking it's too lean, and it richens the mixture to compensate.

Let's expand on the leaking injector thing for a moment. Get a helper to assist....hook up your fuel pressure gauge. Pinch off the return line with vice grips as close to the rail as possible. Now, have your assistant turn the key on but don't crank the engine. Immediately after the 2 second prime, pinch off the pressure line as well. Now watch your gauge. With both fuel lines pinched off tightly, it should hold 40 or so psi indefinitely. If the pressure suddenly falls off, you have a leaking injector(s). If not, you don't.

Now....they may not be pulsing correctly and may be hung open when grounded. Or you may have a bad injector driver in the ECM, but we will cross that bridge if/when we get to it.

Run the test, post the results

 

As was already suggested, check the voltage. I would also check to make sure the the distributer was set right when the previous owner put it back in. Also at the back of the manifold is ground that would have had to be removed when the manifold was replaced. I'd check that also.

 

Running right? or Running period? I'd be suspecting the problem is related to the intake change. Apart from wondering why the intake was changed, I'd be checking that the distributor has be re-installed properly. Have you checked the timing or at least checked that it is close even without the engine running?

 

I took apart the dist cap and one of the connectors was off of the control module. I pluged it back up and fixed some rigged up wiring and vooom, it started. There are some hesitation when you first floor it. I'm going to check the timing and the tps sensor and maybe I can take care of that, but its running great. thanks everyone!

 

i was going to say the timing was off but you got it. good luck with it