I have an 89 Chevy 2500 P/U with a 5.7, that will not start. The engine cranks at a good speed, it has spark at the right time according to the timing light on #1 spark plug, with a fuel psi addapter istalled in place of the fuel filter I have 10 psi/9psi while cranking and fuel spraying from the fuel injectors in the throttle body. Compression test shows between 135 to 145 psi and the engine will not start. Do you have some suggestions for me? Thanks, Arnold

Did you ever figure your problem out. I also have a 89 4x4 with the the throttle body injection. And same exact thing. Of a morning I can crank till the battery is dead. Hook my Ole lady truck up to it with cables and still nothing. After work in the afternoon it will fire rite up. It's done this to me for a week now. My boss is getting a Lil aggravated having to come pick me up every morning. Any help would be greatly appreciated thanks

Does it even try? Spit and sputter? Start and die? Or does it not even fire? Fuel pressure is a little low but it should start with 9 psi.

It is likely flooded, The spark may have to be checked manually. Remove a plug and set it on the head and see it spark. It's possible that the exhaust is stopped up. If you have a full set of tools the easiest way to check this is to remove the oxagen senser but with out the right tools the EGR valve. You might want ot take the EGR valve off anyway, to make sure that it's not stuck open. With it set aside and the wire still connected block the vacume side and try to start. The exhaust should come out the exhaust hole but it could be stopped up. Just stick a coathanger wire down it and root it out, Theirs nothing in there that a coathanger can hurt and then it shoud blow though. try again. No nothing? remove the plugs and clean them I use a map gas tourch as it's handy easy and fast. Burn off all the **** thats on them and put em back in. If as you claening then they have alot of gas the fuel pressure regulater may be leaking and it'll put alot of gas and flood the engine out if this has been happening for awhile the oil may be filled with gas that will add to this flooding even more. With all the plugs clean try to restart the car but thinking that it may be flooding don't let it idel and rev it up good to blow the extra fuel out the exhaust, it may recover and run just fine. The compression and fuel pressure sounds good that you found , The distrubuter timing could be off but with the compression neaqr 150 it should start and run. The cam timing could have skipped ( timing chain) this almost always makes the compression go less and 150 is a normal engine even a 5.7