car hesitates after idle...
#6
Rotary Gearhead
iTrader: (6)
I found out a few weeks ago that my walbro doesn't like to be choked down with the stock resistor pack. It pulls enough current through the stock pump circuit to overheat the resistor pack if your car has one. I started having hesitation problems with my walbro and I checked voltage at the pump connector and I had 4.5 volts at idle. I checked fuel pressure and measured 19 PSI, barely enough to run the engine. I checked the resistor against specs and measured 4.0 ohms. I replaced the resistor with a known good one and put the stock pump back in and I now have 29 PSI and no more hesitation. My opinion is to only use a walbro on a TII, not NA and only do a rewire mod on TIIs as well. Check your pump volts at idle at the connector (backprobe it).
#7
Shooting for 500
iTrader: (3)
I found out a few weeks ago that my walbro doesn't like to be choked down with the stock resistor pack. It pulls enough current through the stock pump circuit to overheat the resistor pack if your car has one. I started having hesitation problems with my walbro and I checked voltage at the pump connector and I had 4.5 volts at idle. I checked fuel pressure and measured 19 PSI, barely enough to run the engine. I checked the resistor against specs and measured 4.0 ohms. I replaced the resistor with a known good one and put the stock pump back in and I now have 29 PSI and no more hesitation. My opinion is to only use a walbro on a TII, not NA and only do a rewire mod on TIIs as well. Check your pump volts at idle at the connector (backprobe it).
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#8
Engine, Not Motor
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Join Date: Feb 2001
Location: London, Ontario, Canada
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Can you post your map? I assume some kind of standalone, so it's going to be a tune issue. My guess is that as the engine heat soaks, you are moving into an untuned area of the map...
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fastrx7man
3rd Generation Specific (1993-2002)
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09-02-15 09:42 PM