that drop fast is caused by 3 things, 1 being injector leaks.
35 running is ok.
jumping to 45 is ok. gunned.
ok back now
that is not bogging it's misfire, are all 4 spark plugs running black or just 1" (spark plug reading is needed on all cars, and for sure OBD1)
they are new, and im sure not wild crazy, surface fire plugs and are gapped to 0.028" for sure, this EFI does not run wide gap plugs ever. for sure not out of the box (set at .045 is dead wrong, and is what the machine that made them uses, have proof from NGK)
if one spark plug turns black that can be a 25% or more loss in power its only 4 cylinders, easy 24HP. each 95 total.
if one goes dead the other 3 get to drag 1 dead cylinder around, and so you lose say 30 HP,
starving for fuel is rank white tips spark plugs never black.
that black smoke is unburned fuel and is misfiring,
say lost power, not bog, sure lost power is first sure lost power is lean burn.
the engine makes its full power at 12.5:1 AFR, air to fuel.
14.7 to 1, is normal cruse closed loop
10:1 is way too rich and misfires, and makes lots of black smoke.
16: 1 is very lean and bogs, (like haveing 20 psi for fuel pressure gets you here)
wish I knew all 4 spark tips colors>
that flood (in texas? south coast?)
was the flood , full of salt water? or just fresh.? my guess would be fresh. but IDK
I think we need to know what spark tips look like.
after all spark can fail on 1 cylinder
1 injector can fail on 1 cylinder. (caN leak, or go dead or have 1/2 flow rates due to 10micron screens inside packed)
The ECT must read 300 OHms hot engine. no scan tool so only using and ohm meter works here, (connector pulled engine fully hot.)
if the ECU reads wrong the EFI goes to cold running, rich mode. can do super rich , if way wrong or thermostat removed or stuck open)
35 running is ok.
jumping to 45 is ok. gunned.
ok back now
that is not bogging it's misfire, are all 4 spark plugs running black or just 1" (spark plug reading is needed on all cars, and for sure OBD1)
they are new, and im sure not wild crazy, surface fire plugs and are gapped to 0.028" for sure, this EFI does not run wide gap plugs ever. for sure not out of the box (set at .045 is dead wrong, and is what the machine that made them uses, have proof from NGK)
if one spark plug turns black that can be a 25% or more loss in power its only 4 cylinders, easy 24HP. each 95 total.
if one goes dead the other 3 get to drag 1 dead cylinder around, and so you lose say 30 HP,
starving for fuel is rank white tips spark plugs never black.
that black smoke is unburned fuel and is misfiring,
say lost power, not bog, sure lost power is first sure lost power is lean burn.
the engine makes its full power at 12.5:1 AFR, air to fuel.
14.7 to 1, is normal cruse closed loop
10:1 is way too rich and misfires, and makes lots of black smoke.
16: 1 is very lean and bogs, (like haveing 20 psi for fuel pressure gets you here)
wish I knew all 4 spark tips colors>
that flood (in texas? south coast?)
was the flood , full of salt water? or just fresh.? my guess would be fresh. but IDK
I think we need to know what spark tips look like.
after all spark can fail on 1 cylinder
1 injector can fail on 1 cylinder. (caN leak, or go dead or have 1/2 flow rates due to 10micron screens inside packed)
The ECT must read 300 OHms hot engine. no scan tool so only using and ohm meter works here, (connector pulled engine fully hot.)
if the ECU reads wrong the EFI goes to cold running, rich mode. can do super rich , if way wrong or thermostat removed or stuck open)
(12-03-2018, 04:10 AM)randyz71 Wrote: ok did fuel pressure test at fuel rail 20 dollar harbor frieght. 50 psi key on, drops almost immediatlly key off. 35 psi running until i get to the bog stage over 3k rpm then pressure jumps to 45 psi while it is bogging and acting fuel starve. turn key off pressure drops fast.
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