Quote:
Originally Posted by rfmaster
7789
What you are describing is a classic low fuel pressure symptoms. After 20+ years of service either fuel pump or the hose that connects pump to to the tank feed through are getting tired. TBI system is designed to operate at about 13 PSI, but will still function down to about 4-6 PSI. In other words.
Check your fuel pressure at TB
Check fuel filter
//RF
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I replaced both pumps in my dual tank setup about 18 months ago and more recently replaced the fuel filter and put a stainless braided line with Earls anodized fittings from the filter to the throttle body and an inline fuel pressure gauge which reads 13 psi. I also installed CFM technologies adjustable fuel pressure regulator with a new diaphram at the same time. The switching valve is original and i replaced all the rubber hoses from it to the tanks at the same time i did the pumps. Maybe my gauge is wrong?!.......To more accurately describe the sound the engine makes on acceleration is like pinging or knocking but i know the timing is set dead on zero because i replaced the distributor a couple months ago when the magnets were weak and reset the timing with the connector unplugged and reset base idle. I am able to see my coolant temp as the computer does with my laptop and it is working like it should as are all the other sensors. Maybe the fuel injectors are bad somehow but i doubt it because of the low mileage on the engine and when i look at the spray it seems normal.