Webber carb swap - Page 6 - Infamous Nissan

89'HBV6 · 01-06-2021, 03:51 AM

Quote:

Originally Posted by jp2code

With the CEL on, it won't pass emissions. Your MAF (and probably O2 sensors) will never be accurate, so the ECU will always be in limp mode.

Your best bet will be to rip out the ECU if you are going to do all that.

Oooooooo, I'd not yank it.

Easy fix(?), snip the ground lead for CEL light...... or unplug the bulb? No CEL light, no problem?

OH, no emissions in WA!

jp2code · 01-06-2021, 11:28 AM

Quote:

Originally Posted by 89'HBV6

Oooooooo, I'd not yank it.

Easy fix(?), snip the ground lead for CEL light...... or unplug the bulb? No CEL light, no problem?

OH, no emissions in WA!

It would still be running in limp mode.

89'HBV6 · 01-06-2021, 10:38 PM

Quote:

Originally Posted by jp2code

It would still be running in limp mode.

Once carb'd, what would that matter? Would it affect how the truck runs?

I'm looking at keeping the ECU for the "other things" it controls. Is there a problem with this "path" in the thought process?

jp2code · 01-06-2021, 11:16 PM

Quote:

Originally Posted by 89'HBV6

Once carb'd, what would that matter? Would it affect how the truck runs?

I'm looking at keeping the ECU for the "other things" it controls. Is there a problem with this "path" in the thought process?

I'm not sure, to be honest.

You show a 89 model truck, which doesn't have nearly as many features being controlled as the 96 model truck from travisg96.

The older trucks are converted to carbs more often. I haven't seen many people on here converting newer stuff to a carb, though.

My 94 has an aluminum intake plenum. I don't even have a way to mount a carb on it.

89'HBV6 · 01-06-2021, 11:34 PM

OK. I don't know either..... thus the question.

I'm good with the FI, for now, but know that things can change quickly with a 30+YO vehicle.

travisg96 · 01-09-2021, 01:02 AM

Quote:

Originally Posted by jp2code

With the CEL on, it won't pass emissions. Your MAF (and probably O2 sensors) will never be accurate, so the ECU will always be in limp mode.

Your best bet will be to rip out the ECU if you are going to do all that.

Then you are going to need to find a way to monitor the fuel tank, speedometer, tachometer, and some probably other things.

These trucks are tied to the ECU pretty hard. The 1986.5 isn't so much. The 1987 to 1989 is more, but it can get by without it. Up to 1995 it gets difficult. In 1996, it went OBD2 and got a lot more dependent on the ECU for engine management.

Mine is an 1986.5 so I think I may be ok. No emissions here in Oregon where I live so I don't have to worry about that. I have no MAF I tore it out when I put the carb on.

cadillacdude1975 · 01-10-2021, 04:46 AM

Joe, you would need a VG30i intake for the carb conversion.

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01-06-2021, 11:34 PM	#55
89'HBV6 Ol'school Geek Join Date: Mar 2020 Location: Washington State Posts: 182 Vehicle: 89' D21 KingCab SE V6 5spd 2WD - 87' D21 KingCab SE V6 5spd 2WD Thanks: 209 Thanked 52 Times in 43 Posts	OK. I don't know either..... thus the question. I'm good with the FI, for now, but know that things can change quickly with a 30+YO vehicle.

01-10-2021, 04:46 AM	#57
cadillacdude1975 The Gear Jammer Join Date: Apr 2013 Location: Chattanooga, TN Age: 48 Posts: 10,160 Vehicle: 87 D21 SE KC V6 2wd 5sp & 87 Pathfinder 4x4 SE Thanks: 419 Thanked 1,250 Times in 1,144 Posts	Joe, you would need a VG30i intake for the carb conversion.