NEED HELP after head swap
Thread Starter
Le Mans Master
Joined: Jul 2005
Posts: 7,121
Likes: 3
From: Shreveport/Bossier Louisiana
St. Jude Donor '08
NEED HELP after head swap
I just tried to start it up for the first time after the head swap and the temp guage is pegged out and the codes I got are P0118, P1636, P1638. It will not start unless it is floorboarded.
Thread Starter
Le Mans Master
Joined: Jul 2005
Posts: 7,121
Likes: 3
From: Shreveport/Bossier Louisiana
St. Jude Donor '08
The coolant temp is reading 62*F but its so flooded that their is fuel in the oil.......Also, When I turn the key on the Fuel Pressure is about 60 PSI which is fine, but after a few seconds it drops to about 15 PSI. Could an injector be stuck open??
Last edited by Corvette-Chris; Nov 24, 2007 at 05:03 PM.
Thread Starter
Le Mans Master
Joined: Jul 2005
Posts: 7,121
Likes: 3
From: Shreveport/Bossier Louisiana
St. Jude Donor '08
Just heads. The cam was already in. Everything is plugged back in. I have SVO 30# to put in but I know it wont run with those to long without a tune so I was just going to start it and make sure everything was fine before I went to have it tuned so the stock injectors are still in
Thread Starter
Le Mans Master
Joined: Jul 2005
Posts: 7,121
Likes: 3
From: Shreveport/Bossier Louisiana
St. Jude Donor '08
Yeah I used the LS1HowTo as a guide but didnt use it all that much. I have doubled checked everyhting. All the injectors are definantly plugged in but we may take the intake back off to check if I forgot anything in the back. I dont think I did but I guess it doesnt hurt to check.
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Drifting
Joined: Apr 2007
Posts: 1,848
Likes: 1
From: Central Florida
Thats a good start.. Perhaps it can be an air leak from underneath the intake .. Check the map and vacuum from behind the intake and make sure theyre plugged in. Either way, thats where I would start.
Drifting
Joined: Mar 2005
Posts: 1,737
Likes: 0
From: Northern VA
I have had cars flood and fuel foul plugs when started without coolant due to false temp reading.
Did you pull plugs? If you have a stuck injector, you should be able to tell which one.
Thread Starter
Le Mans Master
Joined: Jul 2005
Posts: 7,121
Likes: 3
From: Shreveport/Bossier Louisiana
St. Jude Donor '08
No, the guage is pegged out but the OBD II says the ECT reads 62*. Havent pulled the plugs yet
Thread Starter
Le Mans Master
Joined: Jul 2005
Posts: 7,121
Likes: 3
From: Shreveport/Bossier Louisiana
St. Jude Donor '08
Turns out there were 2 problems. I also have nitrous and either some wiring is backwards making the silonoid stay open or it is time for a silonoid rebuild because that was causing it to lose fuel pressure. The second problem was the ECT sensor. It would read 62* first, then when we went back out this morning to check again it read -38...BINGO!! I changed it and it runs great without the nitrous lines hooked up to the end of the fuel rail. When I hook up the Nitrous system fuel line, it wont even start and almost floods out immediatly. At least it runs though 
Thank You for all those who offered advise
Thank You for all those who offered advise
Team Owner
Joined: Mar 1999
Posts: 22,025
Likes: 192
From: At the beach in little Rhody
Glad you found it and its back running again. It can be frustrating after all that work to have a problem like that.
So did you install the AFR's, if so how do you like them? Which gasket did you go with?
So did you install the AFR's, if so how do you like them? Which gasket did you go with?
Thread Starter
Le Mans Master
Joined: Jul 2005
Posts: 7,121
Likes: 3
From: Shreveport/Bossier Louisiana
St. Jude Donor '08
Thread Starter
Le Mans Master
Joined: Jul 2005
Posts: 7,121
Likes: 3
From: Shreveport/Bossier Louisiana
St. Jude Donor '08