lt1 engine problems!

[69camarokid]

You check the fuel filter and fuel pump by checking the fuel pressure, somewhere around 35-40 psi. MAF and MAP sensors can be shot even if they got the right voltage coming in and out of them. The only way I noticed my MAP sensor was bad was by hooking it up to a datamaster program through a laptop and then it was still hard to tell if it was giving correct MAP readings out.



I don't know how a fuel filter is set up on 1st gen camaros. If you got bad fuel pressure then replace that first. I wouldn't think it would run more than $15.

ok, well i had checked the MAP and MAF sensors on a pcm scanner, not the little handheld one, but the big one that shops and cities use, it said only the MAP sensor wasnt working, but thats because it had no power. it does now.

how do i go about checking the fuel pressure. Im completely lost on that part. thanks!

[70 Chevelle]

Pop the mass air flow sensor out and remove the bolts holding the case together. You will see two bars that span the inner circumfrence of the tube. Look carefully at the filaments that span between the two bars, they look like diodes ,if they have exceesive carbon build up clean them. This problem compounds with a K&N filter as the oil in the filter tacks onto those areas and attracts all incoming objects. Use a q tip and electrical contact cleaner to clean them and be VERY delicate as they are fragile . Hope this helps.

[Firebat]

good point 70 Chevelle, forgot all about the K&N air filter oil on MAF problems.

69camarokid - here is a link for checking fuel pressure problems on LT1 - http://shbox.com/1/4th_gen_tech2.htm...essure_testing

Also, shbox.com is a good site for LT1 info.

[paul67]

The other thing to try as well is how much gas have you in the tank, i need a least 2 gallons for mine to run correct as i have not got a well for the pump to sit in.