LT1 issue - Page 2

John Nechiporchik · 07-10-2014, 09:21 AM

During testing last night, The clamp on the upper radiator hose came loose resulting in the hose coming off during the launch of a test pass. The car left hard and the motor began to flutter bad at the top of first gear. It felt like a fuel issue.
Aborted the run and returned to the pits where I found the hose off at the intake, near the throttle body opening. I believe the hose came off and the throttle body got a healthy dose of water. FYI, the water has water wetter (Red Line) and likely a very small bit of antifreeze left from the winter.
I re-filled the radiator and proceeded to make another pass. This pass resulted in the car acting like it had a fuel issue, and was down on power. In third gear (4 speed car),it laid over ,climbed to 6500, dropped to 6000, then slowly climbed up to 7000.
I clicked it off at that point.
So far, I have only examined the plugs, and they all appear OK.
I was wondering if perhaps there was some residual radiator solution in the intake that showed up during this pass.....or if I have other, more significant issues.
I will go thru the valves and check spring pressure,lash,rockers etc. later today.

BTW, When I drained the overflow in the garage last week, the puddle did not dry up for a few days....Likely the effect of water wetter and residual antifreeze. That's why I'm thinking there may have been some residue left in the intake.
Thanks for any help/advice.

07-10-2014, 09:21 AM	#1
John Nechiporchik Member Join Date: Mar 2007 Location: Grosse Ile Mi. Posts: 316 Likes: 84 Liked 13 Times in 7 Posts	LT1 issue During testing last night, The clamp on the upper radiator hose came loose resulting in the hose coming off during the launch of a test pass. The car left hard and the motor began to flutter bad at the top of first gear. It felt like a fuel issue. Aborted the run and returned to the pits where I found the hose off at the intake, near the throttle body opening. I believe the hose came off and the throttle body got a healthy dose of water. FYI, the water has water wetter (Red Line) and likely a very small bit of antifreeze left from the winter. I re-filled the radiator and proceeded to make another pass. This pass resulted in the car acting like it had a fuel issue, and was down on power. In third gear (4 speed car),it laid over ,climbed to 6500, dropped to 6000, then slowly climbed up to 7000. I clicked it off at that point. So far, I have only examined the plugs, and they all appear OK. I was wondering if perhaps there was some residual radiator solution in the intake that showed up during this pass.....or if I have other, more significant issues. I will go thru the valves and check spring pressure,lash,rockers etc. later today. BTW, When I drained the overflow in the garage last week, the puddle did not dry up for a few days....Likely the effect of water wetter and residual antifreeze. That's why I'm thinking there may have been some residue left in the intake. Thanks for any help/advice.