That ignition system works directly with the fuel injection unit allowing it to adjust the timing and tune the motor for the best results. Addition of multi spark also makes the engine run smoother and gives it a more complete burn
No unfortunately I didn’t. Fuel injection isn’t going to make huge differences in mileage honestly. That is unless your quadrajet is running horribly bad. I’m seeing the fuel injection as more of a convenience in cold starting and self tuning abilities in elevation extremes. That’s where I’m hoping it will shine. Once I start driving the coach at full weight I’ll report fuel usage numbers.
Do you mean the fuel return line? I added a fitting to the front tank. The thinking is. The fuel typically migrates to the front tank anyway so with the return line hooked to the front tank I start driving on the rear tank and as the front tank continuously fills the extra gas runs through the fill line to the back tank until the back tank is empty and no more gas migrates to the front tank then I can switch to the front tank which should be full. I hope that makes sense lol
@@getoutgadabout3423 I have the same question. Behind pass side front wheel is the canister (charcoal filled canister? About 1/4 gallon or so in size) holding fuel vapors and the original carb or manifold (can't remember which) had a vac hose going the the canister to suck the vapors out. So where on the manifold or efi do you connect that canister hose?
WOW. I guess I read the first question to fast and was way off base lol. Honestly I haven’t hooked my canister back up yet. It was disconnected when I got my coach. My tank still vents to it but the other line is disconnected. More then likely I will be teeing it off the pcv line. I’m pretty sure it can connect to any manifold vacuum port though.
@@getoutgadabout3423 I dont know if you have modified gas tanks, but from what I have read about the GMC RVs, the 2 gas tanks are cross-connected. You don't drain from the back tank only when driving. You drain from both equally. When you get the low fuel warning, the back will be empty, and the front will have about 7-8 gallons left in it (Reserve). You move the switch to the Aux tank and now your tanking fuel from it. You have to hit the next gas station (50+ miles?) to fill the tanks again. You will NOT have a full front tank when the back tank is empty, unless someone has modified the connections between the tanks.
Yes the tanks do share fuel because of the fill tube but the front tank tends to capture and hold fuel do to the fill tube location. When you brake fuel from the rear tank runs up the fill line into the front tank and captures it being the fill tube is at the front of the tanks. On acceleration tho opposite doesn’t happen. If you drive till your front tank is empty and switch to the rear tank. When that tank empties you will have some fuel in the front tank again. The fuel injection is Plumed for the return line in the front tank to give me a more true reading of the total fuel level in the rear tank. being the front tank is always as as full as it can be with the fuel sharing until the fuel drops below the fill tube.
I really enjoyed the content you have created. I'm wondering how things are going now. Are you still building out your coach? Best of luck!
Getting rid of a working HEI ??? Why??
That ignition system works directly with the fuel injection unit allowing it to adjust the timing and tune the motor for the best results. Addition of multi spark also makes the engine run smoother and gives it a more complete burn
How much did you pay for the coach?
I think I paid 3500$ if i recall. probably overpaid with the mechanical issues it had not that it mattered being I’m changing everything anyway.
Did you compare mpg before and after the efi change?
No unfortunately I didn’t. Fuel injection isn’t going to make huge differences in mileage honestly. That is unless your quadrajet is running horribly bad. I’m seeing the fuel injection as more of a convenience in cold starting and self tuning abilities in elevation extremes. That’s where I’m hoping it will shine. Once I start driving the coach at full weight I’ll report fuel usage numbers.
@@getoutgadabout3423 Excellent. Very curious when you get some mileage numbers. Thanks again.
Where did you connect the fuel evap hose to ?
Do you mean the fuel return line? I added a fitting to the front tank. The thinking is. The fuel typically migrates to the front tank anyway so with the return line hooked to the front tank I start driving on the rear tank and as the front tank continuously fills the extra gas runs through the fill line to the back tank until the back tank is empty and no more gas migrates to the front tank then I can switch to the front tank which should be full. I hope that makes sense lol
@@getoutgadabout3423 I have the same question. Behind pass side front wheel is the canister (charcoal filled canister? About 1/4 gallon or so in size) holding fuel vapors and the original carb or manifold (can't remember which) had a vac hose going the the canister to suck the vapors out. So where on the manifold or efi do you connect that canister hose?
WOW. I guess I read the first question to fast and was way off base lol. Honestly I haven’t hooked my canister back up yet. It was disconnected when I got my coach. My tank still vents to it but the other line is disconnected. More then likely I will be teeing it off the pcv line. I’m pretty sure it can connect to any manifold vacuum port though.
@@getoutgadabout3423 I dont know if you have modified gas tanks, but from what I have read about the GMC RVs, the 2 gas tanks are cross-connected. You don't drain from the back tank only when driving. You drain from both equally. When you get the low fuel warning, the back will be empty, and the front will have about 7-8 gallons left in it (Reserve). You move the switch to the Aux tank and now your tanking fuel from it. You have to hit the next gas station (50+ miles?) to fill the tanks again. You will NOT have a full front tank when the back tank is empty, unless someone has modified the connections between the tanks.
Yes the tanks do share fuel because of the fill tube but the front tank tends to capture and hold fuel do to the fill tube location. When you brake fuel from the rear tank runs up the fill line into the front tank and captures it being the fill tube is at the front of the tanks. On acceleration tho opposite doesn’t happen. If you drive till your front tank is empty and switch to the rear tank. When that tank empties you will have some fuel in the front tank again. The fuel injection is Plumed for the return line in the front tank to give me a more true reading of the total fuel level in the rear tank. being the front tank is always as as full as it can be with the fuel sharing until the fuel drops below the fill tube.