Has fuel pressure, starts only sometimes.
Thread Starter
Teching In
Joined: Dec 2005
Posts: 6
Likes: 0
Has fuel pressure, starts only sometimes. I have searched through all the threads and read about most all the different problems but I did not come across what seemed like the magic bullet for me. My Camaro is a '98 LS1 with just under 90k on the odometer. The engine is a '01 with roughly 40k on the assembly. The entire fuel system is factory minus the fuel filter which was replaced at proper intervals. The car was never an issue until I finally decided to get it dyno tuned. The car sits and is not my daily driver so before dropping it off I did a synthetic oil change and filled the tank with new 91 octane. While it was at the shop the stock ignition wires were swapped to MSD units and fresh spark plugs were installed. During tuning the car got a hickup in the giddyup and began not restarting properly. The car has an LS6 intake, RK lid, BBK underdrive pulley, Dynatech LTs and cats, Lunati Voodoo cam
, and a Magnaflow after-cat exhaust. In tuning we opted to turn off the rear 02s, iAIR, and iEGR. Car absolutely runs like a raped ape...when it starts.
I can walk out right now and it may start after 5 times or 25 times then run perfect. Fuel pressure is at 60psi at the click of the key then settles in at 50-51psi. I thought for sure it was a fuel pump issue and now I am not sure. I swapped the ignition relay and got nowhere with that. I am in need of some of the groups opinions on the issue.
, and a Magnaflow after-cat exhaust. In tuning we opted to turn off the rear 02s, iAIR, and iEGR. Car absolutely runs like a raped ape...when it starts. I can walk out right now and it may start after 5 times or 25 times then run perfect. Fuel pressure is at 60psi at the click of the key then settles in at 50-51psi. I thought for sure it was a fuel pump issue and now I am not sure. I swapped the ignition relay and got nowhere with that. I am in need of some of the groups opinions on the issue.
Teching In
Joined: Feb 2006
Posts: 39
Likes: 1
From: cincinnati
try this with a fuel pressure guage that has a hose that you can by-pass (or release fuel)to a container. turn on key, check pressure, release pressure, check again if will start after a series of playing with the pressure but then sometimes doesent have any or low pressure its the pump--- if it is your in for about 4 hours of fun
