Hi there, sorry about the caps in the title.... but I'm at a loss here.

83 Camaro 5.0 sat for 10-14 years.

changed the following
fuel pump and sock filter
fuel filter
HEI
ECM

had it running two days ago with both injectors firing though it was idling very low than high... low than high.

have 12-13 PSI in fuel lines at start up and maintains that pressure.

Now front injector wont fire (though it clicks) and car wont start.

Upon turning over there will be a blowback out of throttle body of rear injeector and sometimes catch fire

any advice would be greatly appreciated..... I'm at a loss.

thank you

 

that is a long time sitting. A lot of things can happen in that amount of time. corrosion of fuel lines, fuel tank pick up, and rodents of many kinds, including spiders and their webs in places you could never imagine. Point is, I don't know what you have done to trace the complete fuel system is order to give you a good answer. Another area to trace is the electronics as corrosion in places again you can't imagine this happening. Like the fuse block. Make sure you clean every connection, every connection. To me, it sounds like blockage, or low voltage. Re-trace these areas and report back. I stored a '92 Camaro Heritage Pkg Z-28. I had the same problem of not starting. Come to find out, the setting rusted the catalytic convertors bad enough that pieces blocked the exhaust, causing the computer to shut the car down completely. Things happen when they sit for a long time.

 

Sam, you do know you are on the Crossfire Forum for cars, not the forum for Crossfire injection, right? LOL......

 

LOL no... new to the forum.. sorry. Thank you for the response.. I've traced everything electrical back to faulty connectors on the ECM which I've fixed. The car was stored inside a garage and covered.. it's in good shape. I freed up the injectors that were both seized with a 9 volt battery and throttle body cleaner.. got them both firing like that. There is blowback in the throttlebody when running though... could be blocked exhaust or carbon build up?

 

I would not think block exhaust, but I would take that throttle body apart or at least off and soak it in some carb cleaner. I would not trust those injectors either. As for being in the garaged covered, so was mine. The exhaust rusted sitting. Keep in mind, every time you start a car you get moisture in the exhaust, and just because I started it in the garage, I never got rid of the moisture. Never even thought about it. But do check your exhaust for blockage, but I don't think this is your problem at this point.

 

Thanks for the response. I'm going to order up the front and rear injectors and post my results. In the meantime I'll take out the throttle bodies and soak in carb cleaner.

 

I think that would be a good start...try the throttle body after the soaking before spending money on the injectors, or better yet, clean them as well....good luck...let us know your results..

 

Doc, I'm no mechanic but could it have possibly slipped the timing belt/chain on its initial run? I was just wondering with the blowback.

 

Well, if that happened Larry, it wouldn't run, and if did run it would be a bucking bronco on start up. He didn't describe that in his post. When slobbering fuel like that, it is usually a bad injector or more than one injector. Could be injector, or no power getting to the injector. The fuel isn't being spent. Throttle bodies can be clogged as well. Right now, I would be cleaning and making sure they are all firing. It sat a long time. You wouldn't believe what a little spider web can do....lol

 

Double check the firing order and spark plug wires. You may have mixed them up. Check that the distributor isn't off a tooth too. A huge vacuum leak will cause similar popping, rough idle, super rich condition too. Some cam gears were nylon, well late 60's early 70's anyway. They would get brittle after around 15 years and strip the teeth off. The lucky had it happen at startup .... like me. I don't think that's your problem though. Start with the simple/ easy to overlook things.

Les

 

Owned a 84 z-28 crossfire, ugly system all talk, no play. That plenum sitting that long, My guess is you have a huge vacuum leak. As its a plenum many dont think its 2 pieces.. and just check around base and injector areas. I find leaks with some starting fluid (be very careful, to much and its not good) when cranking spray around base of intake (NOT INTO IT!!!) see if it fires, you have a vacuum leak. Have seen the plenum gasket bad on many of them. Of course you are saying an injector isn't fireing, swap um around, see if its the injector or elsewhere.

mine had a shorted tach wire that cause all sorts of problems starting (not like your problems) but wouldn't hurt to unhook the tack from the distributor to eliminate one other trouble spot (brown wire if I remember right).

one thing, with that old of car sitting, gas? it takes along time to move through all the lines and get fresh if you didn't drain it.. grab a small oil squirt can put some fresh gas in it and squirt a few shots in each injector area, fire it up and see if runs for 1-3 seconds..
how many miles, small block chevys don't have much timing chain problems unless they have excessive miles. They have been know to break a camshaft (unlikely) pop the cap off the distributor and crank it, make sure its turning. Broke cam and it will sorta turn on and off.

that is of course if you have treid the other great suggestion here (wires!)

good luck let us know if you figure it out.

 

All good advise for a car setting that long.

 

two new injectors.
starts and runs like a dream.

Thanks everyone for all the input.