FWIU a way to check is to turn the KOEO, check pressure, then turn the key off and see how long it takes to lose pressure. If the regulator and injectors are good, it should hold pressure for a while.
'97 C1500 5.7 V8 Odd problem
- Thread starter DocBernard
- Start date
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DocBernard
Newbie
I appreciate all the suggestions and ideas....now how do I determine what component?
LOL, irritated that i went and replaced the MAS.....it did nothing.
LOL, irritated that i went and replaced the MAS.....it did nothing.
Also, a fuel pump, like an alternator or starter can be degraded vice completely failed. So I could be weakened and not providing enough volume to maintain the correct pressure.
Most of the time they completely die, but not all of the time.
Might be helpful to test fuel pressure.
Most of the time they completely die, but not all of the time.
Might be helpful to test fuel pressure.
DocBernard
Newbie
I can tell you I got sprayed pretty good when I cracked the line to check pressure after cranking it and letting it sit. Won't do that again.
Has code reappeared?
DocBernard
Newbie
No
Similar, yet different:
- KOEO, check pressure (as stated above)
- If pressure remains after pump shuts off, pull fuel fuse
- Crank engine, see if pressure drops (indicative of injectors firing)
- Reinstall fuse
- Crank engine again, check pressure is present and w/in spec (OP may have done this already)
And/ or:
- Pull fuse to disable injectors (see attached schematic)
- Crank engine, check fuel pressure (injectors disabled)
- Install fuse
- Crank engine, check fuel pressure (injectors enabled, pressure should be same or nearly 1st reading)
Last edited:
Guessing at parts changing. Eeny, meeny, minee, moe. My wife told me to pick this one so you are...etc. 61 chevy c10 maybe.
97 chevy truck. 99.9 % your wrong, wanna phone a freind, he'll probly ask if you have the free factory service manuals on this forum?
Open a pressurized fuel line, having atomized fuel spraying in engine compartment.
Maybe you should stop, before your on the evening news.
97 chevy truck. 99.9 % your wrong, wanna phone a freind, he'll probly ask if you have the free factory service manuals on this forum?
Open a pressurized fuel line, having atomized fuel spraying in engine compartment.
Maybe you should stop, before your on the evening news.
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