ls1 guru needed cant get her started
05-24-2014, 09:43 PM
#22
Staging Lane
Thread Starter
iTrader: (1)
Join Date: Dec 2009
Posts: 60
Likes: 0
Received 0 Likes
on
0 Posts
I'm pretty sure the ls1 PCM can handle the 36lb injectors. I have swapped them on other engines with no issues.
The harness is nodded to be an ls1 harness and the PCM is for a ls1.
05-24-2014, 11:52 PM
#27
For a bone stock 5.3L there probably to much unless you put the correct data in there.
There are different years of the LS1. The computer and tune should be of a similar year tune and PCM. If you set it up for a 98 camaro and your useing 04 GTO pinouts you could run into an issue.
05-25-2014, 09:34 AM
#28
Staging Lane
Thread Starter
iTrader: (1)
Join Date: Dec 2009
Posts: 60
Likes: 0
Received 0 Likes
on
0 Posts
Yes, Which is why I brought it up. The tune needs to be scaled accordingly.
For a bone stock 5.3L there probably to much unless you put the correct data in there.
There are different years of the LS1. The computer and tune should be of a similar year tune and PCM. If you set it up for a 98 camaro and your useing 04 GTO pinouts you could run into an issue.
For a bone stock 5.3L there probably to much unless you put the correct data in there.
There are different years of the LS1. The computer and tune should be of a similar year tune and PCM. If you set it up for a 98 camaro and your useing 04 GTO pinouts you could run into an issue.
I am using 2002 camaro pinouts w/ a PCM programmed for the same.
I could see to much fuel being an issue I guess.
05-25-2014, 10:04 AM
#29
TECH Fanatic
You are getting fuel, correct? If that is the case I would try to pull the pump fuse and spray starting fluid into the plenum. If the plugs are dry and clean it should fire. Have you verified that the PCM is seeing voltage under cranking and not just in the run position? Yu did verify that you have no DTC's?
If you are getting a pop in the intake my guess would be either incorrect firing order or intake valve not closed fully. This could also explain the funky compression (cylinder pressure) readings.
If you are getting a pop in the intake my guess would be either incorrect firing order or intake valve not closed fully. This could also explain the funky compression (cylinder pressure) readings.
05-25-2014, 10:18 AM
#30
Staging Lane
Thread Starter
iTrader: (1)
Join Date: Dec 2009
Posts: 60
Likes: 0
Received 0 Likes
on
0 Posts
You are getting fuel, correct? If that is the case I would try to pull the pump fuse and spray starting fluid into the plenum. If the plugs are dry and clean it should fire. Have you verified that the PCM is seeing voltage under cranking and not just in the run position? Yu did verify that you have no DTC's?
If you are getting a pop in the intake my guess would be either incorrect firing order or intake valve not closed fully. This could also explain the funky compression (cylinder pressure) readings.
If you are getting a pop in the intake my guess would be either incorrect firing order or intake valve not closed fully. This could also explain the funky compression (cylinder pressure) readings.
I will double check everything again today. For the tenth time. Lol. FML!!!
05-25-2014, 10:46 AM
#31
If the plugs are black its over fueling.
You need to address the injectors in the tune.
You can't run a larger injector without putting the correct data in the PCM. The computer can not correct for such a large difference.
Also if your computer is set up for an LS1 5.7L and you're running a 5.3L you need to correct the Bore size as the computer uses this to calculate the airflow/fueling requirements.
You need to address the injectors in the tune.
You can't run a larger injector without putting the correct data in the PCM. The computer can not correct for such a large difference.
Also if your computer is set up for an LS1 5.7L and you're running a 5.3L you need to correct the Bore size as the computer uses this to calculate the airflow/fueling requirements.
05-25-2014, 11:08 AM
#32
Staging Lane
Thread Starter
iTrader: (1)
Join Date: Dec 2009
Posts: 60
Likes: 0
Received 0 Likes
on
0 Posts
So I was doing some reading and saw this:
The Gen III firing order has been revised from 1-8-4-3-6-5-7-2 to 1-8-7-2-6-5-4-3. Note that the pairings 1-8, 4-3, 6-5, 7-2 remain the same, but the pairing order is different for reduced vibration.
When I set my pushrods the firing order was 1-8-7-2-6-5-4-3. If I am running a 2001-2002 12200411 Pcm would this be the correct order?
The Gen III firing order has been revised from 1-8-4-3-6-5-7-2 to 1-8-7-2-6-5-4-3. Note that the pairings 1-8, 4-3, 6-5, 7-2 remain the same, but the pairing order is different for reduced vibration.
When I set my pushrods the firing order was 1-8-7-2-6-5-4-3. If I am running a 2001-2002 12200411 Pcm would this be the correct order?
05-25-2014, 11:09 AM
#33
Staging Lane
Thread Starter
iTrader: (1)
Join Date: Dec 2009
Posts: 60
Likes: 0
Received 0 Likes
on
0 Posts
If the plugs are black its over fueling.
You need to address the injectors in the tune.
You can't run a larger injector without putting the correct data in the PCM. The computer can not correct for such a large difference.
Also if your computer is set up for an LS1 5.7L and you're running a 5.3L you need to correct the Bore size as the computer uses this to calculate the airflow/fueling requirements.
You need to address the injectors in the tune.
You can't run a larger injector without putting the correct data in the PCM. The computer can not correct for such a large difference.
Also if your computer is set up for an LS1 5.7L and you're running a 5.3L you need to correct the Bore size as the computer uses this to calculate the airflow/fueling requirements.
05-25-2014, 11:28 AM
#34
So I was doing some reading and saw this:
The Gen III firing order has been revised from 1-8-4-3-6-5-7-2 to 1-8-7-2-6-5-4-3. Note that the pairings 1-8, 4-3, 6-5, 7-2 remain the same, but the pairing order is different for reduced vibration.
When I set my pushrods the firing order was 1-8-7-2-6-5-4-3. If I am running a 2001-2002 12200411 Pcm would this be the correct order?
The Gen III firing order has been revised from 1-8-4-3-6-5-7-2 to 1-8-7-2-6-5-4-3. Note that the pairings 1-8, 4-3, 6-5, 7-2 remain the same, but the pairing order is different for reduced vibration.
When I set my pushrods the firing order was 1-8-7-2-6-5-4-3. If I am running a 2001-2002 12200411 Pcm would this be the correct order?
1-8-4-3-6-5-7-2 is the old 350 small block style firing order. It's also shared on the chrysler fifth avenue, pontiac, and range rover.
