Wednesday, November 24, 2010

How much fuel presure is a 95 caprice 5.7 need to have?

right now all i got is 30 psi is that good are not good enough ,the plugs are firein but the motor will not even hit like it is going to start up , please give a list of things that could cause this. it was runing fine untill the vent hose came off of the dist cap and i got water in it then it got were it would if you kicked down on it it acted like a stopped up fuel filter and as long as i drove it easy it was fine untill the other day it quit on me and would not start up so i checked the plugs and they were not firein,so i changed the dist cap and they are firein now but it acts like it is not getting gas now . sorry for not being organized with this question but i really need some help with this. back when it was running i took it to a shop and hooked it up on a com. first they told me the knock sensor i changed that and did not work, took it back to the shop and they told me the coolent sensor was bad guess what? that didn't fix it. i have put a new fuel filter on it , changed the ignition module,new plugs, coil, so if you know anything else i need to check please tell me thanks for any helpHow much fuel presure is a 95 caprice 5.7 need to have?
1]. With engine %26quot;OFF%26quot;, ignition %26quot;ON%26quot;, and the fuel pump running pressure should 41.0 to 47.0 PSI Note: give it a blast of alternate fuel (choke cleaner in the throttle body and try it that way you will know if it is a fuel problem!!!) Then again you can just throw parts at it!!!How much fuel presure is a 95 caprice 5.7 need to have?
I think the pressure should be a little higher... like 35-40 psi or something. If your motor is TPI, you should see a steady cone-shaped pattern of fuel being sprayed from the injectors into the intake. For MPI, hook a NOID light to the connector for each injector and see if you get pulsation (indicated by the light blinking on/off while cranking). If in both cases, neither is happening, then check for the signal thats supposed to come from the ECM... if no signal, then the ECM is your problem.How much fuel presure is a 95 caprice 5.7 need to have?
Have you changed your pickup coil, it sits under your ignition module ? Might be your fuel system, but I'm not sure that you went deep enough on your ignition, since you said this all started with your distributor. I would also check all connections.How much fuel presure is a 95 caprice 5.7 need to have?
you might want to change the fuel filter and then check it again. if the filter is dirty then it won,t read right.