4.3l P0300
July 22nd, 2018, 7:47 PM
#1
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4.3l P0300
I know this is the Blazer-S10 forum, but my issue is with the 4.3 itself and not the vehicle. Please don't flame me, I am desperate here
Hoping someone here can point me in the right direction. 2000 Astro RWD with the 4.3L and 98k miles on the clock, been sitting for the last 7 years without being started. Here is what was done so far, then i will add the current scan tool data. Every part that has been replaced is with AC Delco recommended equipment. Here is the simplified version of work completed thus far
1. new battery and oil change, no fuel pressure on test
2. new AC Delco fuel pump and filter, starts, barely runs, fuel pressure steady at 65 PSI and holding. Tank was drained, no trash in it
3. new AC Delco plugs, wires, cap rotor Check for excess lash in the distributor, no issues
4. Idles much better, P0304 code, bad spark knock, flashing MIL under load. Confirm spark cylinder 4
5. Replace CPFI with upgraded AC Delco MPFI conversion, spark knock cleared, now have a P0300 with flashing MEL under load
6. smoke test for vacuum leaks, all clear, tear down again to confirm all injectors are correct, test again for vacuum leaks-none
There has been Seafoam in the gas tank, Marvel Mystery Oil in the oil and some starting fluid to get her running at first
There are no other codes showing. here is the data captured on the scan tool at idle
ABSLT TPS 0%
RPM 604
CALC LOAD 3.1%
MAF 0.71%
MAP 11.8 HG
COOLANT 192F
IAT 95F
IGN ADVANCE 22.5
ST FTRM1 0.0
LT FTRM1 9.4
ST FTRM2 0.0
LT FTRM2 7.8
SPEED 0 MPH
FUEL SYS1 OPEN
FUEL SYS2 CLOSED
02S13(V) 0.080
O2S21(V) 0.795
ST FTRM21 1.6%
PTO STATUS Dise
Any direction will help. Again, the only codes that have shown have been a P0304, then a P0300 after replacing the spider
Hoping someone here can point me in the right direction. 2000 Astro RWD with the 4.3L and 98k miles on the clock, been sitting for the last 7 years without being started. Here is what was done so far, then i will add the current scan tool data. Every part that has been replaced is with AC Delco recommended equipment. Here is the simplified version of work completed thus far
1. new battery and oil change, no fuel pressure on test
2. new AC Delco fuel pump and filter, starts, barely runs, fuel pressure steady at 65 PSI and holding. Tank was drained, no trash in it
3. new AC Delco plugs, wires, cap rotor Check for excess lash in the distributor, no issues
4. Idles much better, P0304 code, bad spark knock, flashing MIL under load. Confirm spark cylinder 4
5. Replace CPFI with upgraded AC Delco MPFI conversion, spark knock cleared, now have a P0300 with flashing MEL under load
6. smoke test for vacuum leaks, all clear, tear down again to confirm all injectors are correct, test again for vacuum leaks-none
There has been Seafoam in the gas tank, Marvel Mystery Oil in the oil and some starting fluid to get her running at first
There are no other codes showing. here is the data captured on the scan tool at idle
ABSLT TPS 0%
RPM 604
CALC LOAD 3.1%
MAF 0.71%
MAP 11.8 HG
COOLANT 192F
IAT 95F
IGN ADVANCE 22.5
ST FTRM1 0.0
LT FTRM1 9.4
ST FTRM2 0.0
LT FTRM2 7.8
SPEED 0 MPH
FUEL SYS1 OPEN
FUEL SYS2 CLOSED
02S13(V) 0.080
O2S21(V) 0.795
ST FTRM21 1.6%
PTO STATUS Dise
Any direction will help. Again, the only codes that have shown have been a P0304, then a P0300 after replacing the spider
July 23rd, 2018, 1:35 AM
#2
CF Monarch
I know this is the Blazer-S10 forum, but my issue is with the 4.3 itself and not the vehicle. Please don't flame me, I am desperate here
Hoping someone here can point me in the right direction. 2000 Astro RWD with the 4.3L and 98k miles on the clock, been sitting for the last 7 years without being started. Here is what was done so far, then i will add the current scan tool data. Every part that has been replaced is with AC Delco recommended equipment. Here is the simplified version of work completed thus far
1. new battery and oil change, no fuel pressure on test
2. new AC Delco fuel pump and filter, starts, barely runs, fuel pressure steady at 65 PSI and holding. Tank was drained, no trash in it
3. new AC Delco plugs, wires, cap rotor Check for excess lash in the distributor, no issues
4. Idles much better, P0304 code, bad spark knock, flashing MIL under load. Confirm spark cylinder 4
5. Replace CPFI with upgraded AC Delco MPFI conversion, spark knock cleared, now have a P0300 with flashing MEL under load
6. smoke test for vacuum leaks, all clear, tear down again to confirm all injectors are correct, test again for vacuum leaks-none
There has been Seafoam in the gas tank, Marvel Mystery Oil in the oil and some starting fluid to get her running at first
There are no other codes showing. here is the data captured on the scan tool at idle
ABSLT TPS 0%
RPM 604
CALC LOAD 3.1%
MAF 0.71%
MAP 11.8 HG
COOLANT 192F
IAT 95F
IGN ADVANCE 22.5
ST FTRM1 0.0
LT FTRM1 9.4
ST FTRM2 0.0
LT FTRM2 7.8
SPEED 0 MPH
FUEL SYS1 OPEN
FUEL SYS2 CLOSED
02S13(V) 0.080
O2S21(V) 0.795
ST FTRM21 1.6%
PTO STATUS Dise
Any direction will help. Again, the only codes that have shown have been a P0304, then a P0300 after replacing the spider
Hoping someone here can point me in the right direction. 2000 Astro RWD with the 4.3L and 98k miles on the clock, been sitting for the last 7 years without being started. Here is what was done so far, then i will add the current scan tool data. Every part that has been replaced is with AC Delco recommended equipment. Here is the simplified version of work completed thus far
1. new battery and oil change, no fuel pressure on test
2. new AC Delco fuel pump and filter, starts, barely runs, fuel pressure steady at 65 PSI and holding. Tank was drained, no trash in it
3. new AC Delco plugs, wires, cap rotor Check for excess lash in the distributor, no issues
4. Idles much better, P0304 code, bad spark knock, flashing MIL under load. Confirm spark cylinder 4
5. Replace CPFI with upgraded AC Delco MPFI conversion, spark knock cleared, now have a P0300 with flashing MEL under load
6. smoke test for vacuum leaks, all clear, tear down again to confirm all injectors are correct, test again for vacuum leaks-none
There has been Seafoam in the gas tank, Marvel Mystery Oil in the oil and some starting fluid to get her running at first
There are no other codes showing. here is the data captured on the scan tool at idle
ABSLT TPS 0%
RPM 604
CALC LOAD 3.1%
MAF 0.71%
MAP 11.8 HG
COOLANT 192F
IAT 95F
IGN ADVANCE 22.5
ST FTRM1 0.0
LT FTRM1 9.4
ST FTRM2 0.0
LT FTRM2 7.8
SPEED 0 MPH
FUEL SYS1 OPEN
FUEL SYS2 CLOSED
02S13(V) 0.080
O2S21(V) 0.795
ST FTRM21 1.6%
PTO STATUS Dise
Any direction will help. Again, the only codes that have shown have been a P0304, then a P0300 after replacing the spider
FUEL SYS1 OPEN
At 192 F, that should read CLOSED. Probably a bad O2 sensor for starters..