Re: LOST 10mph AND ABOUT 6 TENTHS
 

Everywhere :(

Re: LOST 10mph AND ABOUT 6 TENTHS
 

Try disconnecting the fuel line at the rear of the car blow it out with a low pressure air hose ---if you have a filter blow the line between rear of car and front of filter make sure its open ---then try from tank to before the filter with line disconnected--- from the rear to front try blowing from tank side of the filter thru the filter --- probably a clogged filter --if you do the 3 step method you will isolate where its "plugged"--- how old are the fuel lines in the car?? are they Aeroquip??? or stock??? if they are more than 2-3 years old might be time to replace them as the lining has maybe deteriorated -also check regulator for any obstructions ----FED 387

Re: LOST 10mph AND ABOUT 6 TENTHS
 

For curiositys sake, did you check the rear end housing and see if its flipping? We straightened out a pinion angle shifting problem and housing binding on a car and it was worth half a second.

Re: LOST 10mph AND ABOUT 6 TENTHS
 

Does anybody know if this problem was ever resolved? Curious as to what it ended up being.

Re: LOST 10mph AND ABOUT 6 TENTHS
 

Definitely Check all your battery cables and grounds etc... carefully!

Re: LOST 10mph AND ABOUT 6 TENTHS
 

With a Data Logger, on my car I was able to take my best run and just superimpose one run over the other....

Look at flash, fall back, EGT, fuel pressure and all of your data inputs.

My old AutoMeter logger had this feature, but I don’t know about racepak

Good luck

Re: LOST 10mph AND ABOUT 6 TENTHS
 

Just in case anyone would like an update... it appears as though the electric fan we changed to must’ve been the issue... we went to a water pump/electric fan combo and car ran well - still a few kinks to work out but it appears as though the gremlins have moved on!! Thanks so much for all the ideas and advice!!

Re: LOST 10mph AND ABOUT 6 TENTHS
 

Glad you figured it out!