Getting better but still some issues
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Joined: Sep 2005
Posts: 2,271
From: Bahrain
Getting better but still some issues
Yesterday we changed the opti spark, pass o2 sensor, replaced header gaskets to fix leak, changed maf sensor (old one belived to be faulty), replaced the coil, replaced Opti, replaced map sensor, repalced the spark plugs and wires. We made these changes because it started missing very hard and had a bad idle. After making those changes things improved alot. No fuel smell, no popping out the exauste feels kinda powerfull. I was getting a right lean o2 sensor code before (replaced that sensor) and a high map sensor pressure code. The lean o2 sensor code is now gone but the the map sensor code wont stay away and now I have some new codes.
Code 16 lo-res faliure
code 43 esc faliure
code 33 map sensor high
code 15 coolant tempeture low
I cleared all codes but code 43 esc faliure and code 33 map sensor high came back. There are some other tuning issues as well but I'm unsure of the best way to go about it. Should I just send the tuner more datalogs, will that be enough to tune the car properly? Also now Im getting more knoc than before. When I was running rich the highest amount of knock I saw was 5.0. Now Im getting 6.0 and knock through out the rpm's. Any ideas?
Code 16 lo-res faliure
code 43 esc faliure
code 33 map sensor high
code 15 coolant tempeture low
I cleared all codes but code 43 esc faliure and code 33 map sensor high came back. There are some other tuning issues as well but I'm unsure of the best way to go about it. Should I just send the tuner more datalogs, will that be enough to tune the car properly? Also now Im getting more knoc than before. When I was running rich the highest amount of knock I saw was 5.0. Now Im getting 6.0 and knock through out the rpm's. Any ideas?
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Joined: Sep 2004
Posts: 0
Re: Getting better but still some issues
You have knock retard because you have a a 43 Knock Sensor circuit fault. To check it, pull the wire off the KS and measure the voltage to ground. Should be 5 volts. Measure the resistance of the KS pin to ground. Should be 3300 to 4500 (3.3K to 4.5K) ohms. If its lower the KS is shot. If it's higher, it could be it's not grounded to the block properly. You have to be careful how you seal the threads.
Reset the 33 and disconnect the map sensor. Put KOEO and see if a code 34 sets. Also check the voltage and ground at the sensor plug by probing the grey to black wire for 5 volts. If the 34 doesn't set and the voltage was ok, check the green wire to ground with the sensor disconnected. It should be near 0. If not, disconnect the PCM from the green wire and probe it again. If its still higher than 0 there is a short to voltage. If it goes down when you disconnect the PCM, let us know.
Reset the 33 and disconnect the map sensor. Put KOEO and see if a code 34 sets. Also check the voltage and ground at the sensor plug by probing the grey to black wire for 5 volts. If the 34 doesn't set and the voltage was ok, check the green wire to ground with the sensor disconnected. It should be near 0. If not, disconnect the PCM from the green wire and probe it again. If its still higher than 0 there is a short to voltage. If it goes down when you disconnect the PCM, let us know.
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Alex Barnes
LT1 Based Engine Tech
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Jan 24, 2015 10:21 PM