Tanro
10+ Year Contributor
- 2,458
- 90
- Jul 22, 2009
-
Montgomery,
Alabama
I've got a very weak spark on 2/3 and any amount of load will cause the car to bog down and misfire like crazy. Doesn't matter if its boost, or just 4th / 5th gear if you try and give it more than 1/4 throttle or it gets above 4-5 psi it just starts missfiring terribly.
New parts include:
TPS <- Adjusted per 2g service manual
ISC
Both Coils. Doesn't matter if you swap them the weak spark stays on 2/3.
Coil pack wiring has been rewired with 14awg
Igniter (PTU)
Mass Airflow
Coolant Temp Sensor
Battery
Alternator
0GA Wire from alternator to fusebox.
I've been trying to diagnose this for a year now with no luck. It gets better and it gets worse, but never goes the f*** away.
If you pull the spark plug wires they won't arc to the valve cover/head on 2 or 3. If you use a spark checker it barely lights up as compared to to glowing bright red with 1/4.
I even tried swapping the wires on the harness side (harness to ecm) and then the plug wires as well to see if the weak spark moved to 1/4 but it seemed to make the engine run like total garbage. However it did improve the spark on 2/3 but did not make 1/4 worse.
The car is throwing the infamous p0300 code, buts a 2gb engine, with 2gb sensors, in a 2gb shell, with 98/99 h8 ecu. I am ready to get this stolen and file an insurance claim at this point. A 420a car would be faster than this pile of junk and new parts.
What can I possibly do to get a stronger spark?
New parts include:
TPS <- Adjusted per 2g service manual
ISC
Both Coils. Doesn't matter if you swap them the weak spark stays on 2/3.
Coil pack wiring has been rewired with 14awg
Igniter (PTU)
Mass Airflow
Coolant Temp Sensor
Battery
Alternator
0GA Wire from alternator to fusebox.
I've been trying to diagnose this for a year now with no luck. It gets better and it gets worse, but never goes the f*** away.
If you pull the spark plug wires they won't arc to the valve cover/head on 2 or 3. If you use a spark checker it barely lights up as compared to to glowing bright red with 1/4.
I even tried swapping the wires on the harness side (harness to ecm) and then the plug wires as well to see if the weak spark moved to 1/4 but it seemed to make the engine run like total garbage. However it did improve the spark on 2/3 but did not make 1/4 worse.
The car is throwing the infamous p0300 code, buts a 2gb engine, with 2gb sensors, in a 2gb shell, with 98/99 h8 ecu. I am ready to get this stolen and file an insurance claim at this point. A 420a car would be faster than this pile of junk and new parts.
What can I possibly do to get a stronger spark?
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