'93 4.3L Vortec Wont Start
 

I bought a 93 blazer about 2 weeks ago. I started work on it with a new battery, plugs, wires, cap and rotor, fuel pump, serpintine belt, tires and new gas. I can get it to run if I pour gas into the intake, but only for a few seconds. I took the intake off to see if the injectors were clogged and thats when i found the Cpi unit or spider. Is there any way that i can take that apart to try to clean it out to see if that works or do i have to get a new one. Or if anyone has any other suggestions that i can try this weekend please HELP.

RE: '93 4.3L Vortec Wont Start
 

when you turn the ignition on do you hear the fuel pump hum? is there fuel pressure?

RE: '93 4.3L Vortec Wont Start
 

Yeah it has fuel pressure at the intake and I just put a new fuel pump in. One thing I am going to look at is if I have a good power supply going to the actual injector itself.

RE: '93 4.3L Vortec Wont Start
 

How much fuel pressure?

Got a ICM? If so get it tested.

I know there are other who can feild this question.

RE: '93 4.3L Vortec Wont Start
 

I finally got this Pig running. After spending $300 on a new Cpi unit it still wouldnt start so I went back over things I had replaced already. As it turnes out Oriely Auto gave me the wrong fuel pump. It was for a tbi system which only needs 10 pounds when my Cpi needs 60 pounds. So I dropped the (now mostly full) gas tank again switched them and the thing started up like a champ, even with 212,000 miles and sitting in some guys backyard for almost two years without ever being so much as looked at. Damn I like a 4.3

RE: '93 4.3L Vortec Wont Start
 

I hate when things like that happpen.

Glad to hear oyu got it figured out.

RE: '93 4.3L Vortec Wont Start
 

Man that sucks about the pump, but glad you got it goin'!

RE: '93 4.3L Vortec Wont Start
 

dont want to look like I'm Hijacking this thread, however; everything is so similiar, my truck as well is a 1993, 4.3 and it will not start, I have replaced the plugs, wires and distributor, I have measured the fuel pressure to be 60lbs, I am at a loss, i had it running yesterday, although it was rough, and now today, nothing, doesnt even seem like it wants to catch, any ideas would be great, thanks in advance

RE: '93 4.3L Vortec Wont Start
 

Well it sounds like you have already taken care of what my problem was (which was the wrong fuel pump). When I bought the truck the guy said that he was in Atlanta and it started running like it had a broken valve spring. I never did change any of those. You said that you replaced the distributor, not just the cap right? If that is the case I would check the timing on yours before you move on to more expensive items like the Cpi unit. Now I did change the Cpi but I am not even sure if that was one of the problems but the truck sat for almost two years and then started right up. Like i said before Oriely Auto gave me a fuel pump for a Tbi insteadof a Cpi.