DickM
SILVER Star
- Thread starter
- #41
Finally got back to figuring out my "stumbling" problem. Re-plumbing per previous post was a step in the right direction. After a valve adjustment and tracking down a couple of vacuum leaks, my next step was to check timing.
I had ball-parked it on initial start, and the timing light showed 7* BTDC but I now needed to install the jumper between TE1 and E1 and set the timing like a 3FE. The results lead me to reinstalling the dizzy as I could not get enough advance with the jumper wire installed. I was evidently 1 tooth off. This made a huge difference.
I also installed a fuel pressure gauge(temporarily) to get more info on what was happening with the fuel supply.
Test driving and poking around showed that my stumble or dropout was the result of the fuel pressure dropping sharply off. Fuel pressure was also generally pretty variable, and was accompanied by noticeable fuel pump noise when the dropouts occurred.
My conclusion is to replace the fuel pressure regulator and pulsation dampner. They both are original to the donor motor I bought AFAIK, and are a couple of good variables to eliminate at this point.
As always, I rely on your input.
I had ball-parked it on initial start, and the timing light showed 7* BTDC but I now needed to install the jumper between TE1 and E1 and set the timing like a 3FE. The results lead me to reinstalling the dizzy as I could not get enough advance with the jumper wire installed. I was evidently 1 tooth off. This made a huge difference.
I also installed a fuel pressure gauge(temporarily) to get more info on what was happening with the fuel supply.
Test driving and poking around showed that my stumble or dropout was the result of the fuel pressure dropping sharply off. Fuel pressure was also generally pretty variable, and was accompanied by noticeable fuel pump noise when the dropouts occurred.
My conclusion is to replace the fuel pressure regulator and pulsation dampner. They both are original to the donor motor I bought AFAIK, and are a couple of good variables to eliminate at this point.
As always, I rely on your input.