This site has been awesome to use thank you!
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Joined: May 2020
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This site has been awesome to use thank you!
Greetings! Just wanted to say thx for being there. I purchased a 1994 camaro 5.7 lt1 and have learned so much! Was hoping to ask a question here if that's OK. The car has 40k original miles, and overall runs great. I do plan on getting codes read soon as the SES light is on. My question is this. Cold start fires right up and idles at just under 1k. Runs great. When I shut the car off after even a 5 min. drive, she cranks but struggles turning over unless I put gas all the way down. She then starts right up and runs fine. I feel like she has trouble getting the air the second start. Any thoughts? Thx so much
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From: Hell was full so they sent me to NJ
Re: This site has been awesome to use thank you!
Welcome to CamaroZ28.com ! ! !
Sounds like it's flooding, possibly a leaking injector. Putting the accel pedal on the floor puts the PCM in “clear flood” mode, reducing the amount of fuel the injectors supply. Another possibility is a faulty coolant temperature sensor/circuit. If the sensor it not telling the PCM the coolant is hot, the PCM will use “cold start enrichment”, which produces an excessively rich A/F ratio for a warm engine.
Not easy to find someone to read OBD-1 codes, and neither of the scenarios described above would necessarily set codes. If you have a laptop, download a free copy of Scan9495 - a scanning and data logging program written specifically for the 93-95 LT1. It was written by a member here, GaryDoug. Buy or build the required cable to connect your laptop to the data link connector. Record a data log, produce a .csv file and post it on “LT1 Based Engine Tech” for someone (usually me) to review.
https://www.camaroz28.com/forums/com...95-lt1-874306/
Then learn more about interpreting the data:
https://www.camaroz28.com/forums/com...-guide-886891/
Sounds like it's flooding, possibly a leaking injector. Putting the accel pedal on the floor puts the PCM in “clear flood” mode, reducing the amount of fuel the injectors supply. Another possibility is a faulty coolant temperature sensor/circuit. If the sensor it not telling the PCM the coolant is hot, the PCM will use “cold start enrichment”, which produces an excessively rich A/F ratio for a warm engine.
Not easy to find someone to read OBD-1 codes, and neither of the scenarios described above would necessarily set codes. If you have a laptop, download a free copy of Scan9495 - a scanning and data logging program written specifically for the 93-95 LT1. It was written by a member here, GaryDoug. Buy or build the required cable to connect your laptop to the data link connector. Record a data log, produce a .csv file and post it on “LT1 Based Engine Tech” for someone (usually me) to review.
https://www.camaroz28.com/forums/com...95-lt1-874306/
Then learn more about interpreting the data:
https://www.camaroz28.com/forums/com...-guide-886891/
Thread Starter
Registered User
Joined: May 2020
Posts: 4
Re: This site has been awesome to use thank you!
Welcome to CamaroZ28.com ! ! !
Sounds like it's flooding, possibly a leaking injector. Putting the accel pedal on the floor puts the PCM in “clear flood” mode, reducing the amount of fuel the injectors supply. Another possibility is a faulty coolant temperature sensor/circuit. If the sensor it not telling the PCM the coolant is hot, the PCM will use “cold start enrichment”, which produces an excessively rich A/F ratio for a warm engine.
Not easy to find someone to read OBD-1 codes, and neither of the scenarios described above would necessarily set codes. If you have a laptop, download a free copy of Scan9495 - a scanning and data logging program written specifically for the 93-95 LT1. It was written by a member here, GaryDoug. Buy or build the required cable to connect your laptop to the data link connector. Record a data log, produce a .csv file and post it on “LT1 Based Engine Tech” for someone (usually me) to review.
https://www.camaroz28.com/forums/com...95-lt1-874306/
Then learn more about interpreting the data:
https://www.camaroz28.com/forums/com...-guide-886891/
Sounds like it's flooding, possibly a leaking injector. Putting the accel pedal on the floor puts the PCM in “clear flood” mode, reducing the amount of fuel the injectors supply. Another possibility is a faulty coolant temperature sensor/circuit. If the sensor it not telling the PCM the coolant is hot, the PCM will use “cold start enrichment”, which produces an excessively rich A/F ratio for a warm engine.
Not easy to find someone to read OBD-1 codes, and neither of the scenarios described above would necessarily set codes. If you have a laptop, download a free copy of Scan9495 - a scanning and data logging program written specifically for the 93-95 LT1. It was written by a member here, GaryDoug. Buy or build the required cable to connect your laptop to the data link connector. Record a data log, produce a .csv file and post it on “LT1 Based Engine Tech” for someone (usually me) to review.
https://www.camaroz28.com/forums/com...95-lt1-874306/
Then learn more about interpreting the data:
https://www.camaroz28.com/forums/com...-guide-886891/
Thanks So much for input. I'm gonna try the software. I replaced the coolant temp sensor because the fans weren't kicking on. Now, fans are always on along with the ses. I do get a strong sulfur smell now and again. Went on a 100 mile trip yesterday. No stalling, idle was just under 1k when in park and a little lower at stop lights. Ran beautiful.. I have cleaned the maf sensor. I'm wondering if its running in closed loop mode?
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