Help with 98 blazer crank with no start
#1
Help with 98 blazer crank with no start
I have a 98 blazer 4.3L 4x4, she won't run. She will crank but won't start.
I have changed the starter- cap & rotor - spark plugs & wires - coil- ing mod.
Checked fuel pump & wires - crank sencor and all wires and relays under hood.
I put the obd 2 scanner on the other day and no codes
Now I put the scanner and it pops 2 codes. P0171 & P0174 which I checked and nothing wrong. I'm a chevy girl but this is getting crazy out of hand. I'm stuck and don't have any more clues. Please help!
I have changed the starter- cap & rotor - spark plugs & wires - coil- ing mod.
Checked fuel pump & wires - crank sencor and all wires and relays under hood.
I put the obd 2 scanner on the other day and no codes
Now I put the scanner and it pops 2 codes. P0171 & P0174 which I checked and nothing wrong. I'm a chevy girl but this is getting crazy out of hand. I'm stuck and don't have any more clues. Please help!
#2
Have you checked for spark at the coil tower while cranking? Must jump a half inch gap and produce a blue, not orange, spark to ground.
Have you checked fuel pressure and leakdown? This link explains: https://blazerforum.com/forum/2nd-ge...eakdown-88305/
Low fuel pressure can and will cause P0171 & P0174 to set simultaneously.
Have you checked fuel pressure and leakdown? This link explains: https://blazerforum.com/forum/2nd-ge...eakdown-88305/
Low fuel pressure can and will cause P0171 & P0174 to set simultaneously.
#3
Got it running
Have you checked for spark at the coil tower while cranking? Must jump a half inch gap and produce a blue, not orange, spark to ground.
Have you checked fuel pressure and leakdown? This link explains: https://blazerforum.com/forum/2nd-ge...eakdown-88305/
Low fuel pressure can and will cause P0171 & P0174 to set simultaneously.
Have you checked fuel pressure and leakdown? This link explains: https://blazerforum.com/forum/2nd-ge...eakdown-88305/
Low fuel pressure can and will cause P0171 & P0174 to set simultaneously.
#4
Use genuine AC Delco or Delphi replacement pumps ONLY. Most aftermarket pumps have a lifetime guarantee, but what good is it if you have to replace it every year and a half? They have issues other than longevity too. OEM pumps are good for 100K miles.
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