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J
JW454NOVA
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·
From
BOTHELL, WASHINGTON
Joined
Mar 20, 2024
Last seen
Apr 11, 2024
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J
JW454NOVA
replied to the thread
1989 TBI 350 5.7 Grumman Kurbmaster electrical issue runs rough, PULLING MY HAIR OUT
.
1228747 ECM and "AKWA" PROM chip. I replaced with the Cardone 77-8747 and put in Jet chip #289128. Is this the wrong Chip? The...
Mar 27, 2024
J
JW454NOVA
replied to the thread
1989 TBI 350 5.7 Grumman Kurbmaster electrical issue runs rough, PULLING MY HAIR OUT
.
THANKS good buddy
Mar 26, 2024
J
JW454NOVA
reacted to
scott2093's post
in the thread
1989 TBI 350 5.7 Grumman Kurbmaster electrical issue runs rough, PULLING MY HAIR OUT
with
Like
.
yeesh...wild... Maybe you're on to something regarding the prom. I'm always hearing that getting things working stock is the best...
Mar 26, 2024
J
JW454NOVA
replied to the thread
1989 TBI 350 5.7 Grumman Kurbmaster electrical issue runs rough, PULLING MY HAIR OUT
.
More pics of codes and data.
Mar 25, 2024
J
JW454NOVA
replied to the thread
1989 TBI 350 5.7 Grumman Kurbmaster electrical issue runs rough, PULLING MY HAIR OUT
.
All powers and grounds are good at ECM back probing. Is it possible I installed the wrong PROM? It was a JET prom. Here are pics of scan...
Mar 25, 2024
J
JW454NOVA
replied to the thread
1989 TBI 350 5.7 Grumman Kurbmaster electrical issue runs rough, PULLING MY HAIR OUT
.
I will try that. Thanks.
Mar 23, 2024
J
JW454NOVA
reacted to
evilunclegrimace's post
in the thread
1989 TBI 350 5.7 Grumman Kurbmaster electrical issue runs rough, PULLING MY HAIR OUT
with
Like
.
Perform a voltage drop test on all of your cables
Mar 23, 2024
J
JW454NOVA
replied to the thread
1989 TBI 350 5.7 Grumman Kurbmaster electrical issue runs rough, PULLING MY HAIR OUT
.
Are there any other grounds that I'm missing? I've replaced the head to frame ground. Replaced thermostat ground eyelet and cleaned...
Mar 22, 2024
J
JW454NOVA
replied to the thread
1989 TBI 350 5.7 Grumman Kurbmaster electrical issue runs rough, PULLING MY HAIR OUT
.
Threw in temporary new battery, still no change. Repaired corroded positive cable end.
Mar 22, 2024
J
JW454NOVA
reacted to
Schurkey's post
in the thread
1989 TBI 350 5.7 Grumman Kurbmaster electrical issue runs rough, PULLING MY HAIR OUT
with
Like
.
If the sensor has appropriate resistance with temperature, and the computer thinks it's -40, you clearly have a wiring problem between...
Mar 22, 2024
J
JW454NOVA
replied to the thread
1989 TBI 350 5.7 Grumman Kurbmaster electrical issue runs rough, PULLING MY HAIR OUT
.
Voltage at Battery is 12.3 volts. Battery load tested fine. I put a battery charger on the battery while looking at data and the scanner...
Mar 22, 2024
J
JW454NOVA
replied to the thread
1989 TBI 350 5.7 Grumman Kurbmaster electrical issue runs rough, PULLING MY HAIR OUT
.
I meant the Engine Coolant Temperature sensor. Two wire plug next to the thermostat. Replaced along with pigtail harness.
Mar 21, 2024
J
JW454NOVA
posted the thread
1989 TBI 350 5.7 Grumman Kurbmaster electrical issue runs rough, PULLING MY HAIR OUT
in
Engine Performance + Maintenance
.
Working on a customers 1989 Grumman Kurbmaster with a 5.7 350 TBI. Came into the shop running rough and dying. Pulled up scanner data...
Mar 20, 2024
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