Voltage drop and miss in vtec

autox19

Member
Stock b16a with a hondata ecu. Warbro 255 pump. Misses when in vtec. Turn vtec up high enough to not engage and runs up to 7k no miss. Had this issue before and adjusted dead times to fix. Log shows running lean and voltage drops to about 10 amp when on vtec.
Right now leaning towards toasted fuel pump as the engine us using the stock fiat x19 gas tank that was for a carbed and has to pull the fuel up to the pump. I have a fuel injection tank on its way with the feed on the bottom as well as i am relocating the fuel pump down there as well.
Posting here in case someone has other thoughts. Ran well for over a year. Started slight miss on vtec and was constant in under 10 miles.

Odie
Fiat x19 b16
 

CAFROG

Honda Minion
VIP
Check the screen on the VTEC solenoid. Could be a fuel pump issue but weird that a carb pump just now becomes insufficient. Check/change spark plugs.. .maybe cap/rotor too.
 

autox19

Member
Screen, cap, rotor, plugs, plug wires timing, were all done last year. ( about 200 miles) but will check the screen as it is an easy check.

Odie
 

autox19

Member
Maybe simple....like grounds are loose?
good thought! because I will be relocating the fuel pump I will check. The real crappy part about this is changing the gas tank, because of course you never have to change a tank unless it is full. and yup, mine is full. Fiat made this extra tricky as it is more vertical than horizontal so I pretty much have to empty it before removing or it will tip over on removal. Unlike most carr that are horizontal and you can balance them on a floor jack.

Odie
 

autox19

Member
Picked up the second one. Will let you know how much my arm hurts after.
Tank came in yesterday. Car is up on jack stands (yes i checked and they are not on hf recall :) ) should be starting the process tonight
20200714_103540.jpg



Odie
 

TurboMirage

YEEAAAHHH
VIP
i used one of these in the past (for a lawn mower, not a car)
Fluid Siphon Pump

took a lot and boy was my wirst tired, but it worked.

hindsight, should have gotten one like this: Multi-Use Transfer Pump
the first one is what i used... just sucked the gas up and out to the end and stuffed it in a gas can. i only pumped it for a minute to get it up out of the tank it was easier to hold vacuum once at that point lol
 

autox19

Member
Cake. The second one ran about 1 gal a min. The syphon happens on the push which was nice. I expected to pull up to pull the fuel.

Odie
 
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