Howell Emissions Legal TBI Kit on a 360?

[87 Money Pit]

I am thinking about the emissions legal Howell TBI. Has anyone tried this out / how's the installation?

[Wagoneerlover]

what are the emissions laws like in Jersey? Perhaps you could go with the DIY install. I am sure the Kit that you are looking to use would be somewhat easier than a DIY install. Although I have never used a kit but many of the members here who have used them say that it isnt that difficult.

[FSJ Guy]

The Howell system is only legal for certain years. Put the specs of your truck in your signature file so we don't have to speculate.

[87 Money Pit]

year of my FSJ?

Willl update my profile ... thanks for opinting this out

I have an 87 Grand Wagoneer

[FSJ Guy]

It's only for 72-81 FSJ's. :-(

[87 Money Pit]

It's only for 72-81 FSJ's. :-(

From Howell's website:
TBI KIT: 1972-93 304, 360, 401 V-8 Jeep/AMC -
Emissions Legal

http://www.howellefi.com/customer/tbi-kit-1972-93-304-360-401-v-8-jeep-amc-emissions-legal.html

Here's the CA statement about this kit:

http://arb.ca.gov/msprog/aftermkt/devices/eo/D-452-1.pdf

[Grenadiers]

Sounds like you have not done any research. There's a ton of info on this site, even by doing the minumum of typing in 'TBI' in the search feature.

I just installed one in mine, started with a 401 T/B on my 360 and it ran rich. After installing a junkyard one from a 350cu in engine, smaller injectors, correct computer, works great. Still sorting out a problem I had yesterday. Engine quit going from 4300 feet up to 9200 feet. This was after 200 miles of running across the NM desert at 75 degrees outside. Felt like a vapor lock problem. After towing GW up rest of mountain, it drove great. So, things like this can happen.

[87 Money Pit]

Howell TBI

I've been reading the TBI postings on here for a while including all of the excellent ones on DIY that have great info on making this work and dialing it in afterwards.

When I started dreaming about this upgrade, nobody had a CARB legal kit and this is something relatively new from Howell. I have lived in states that have pretty strict emissions (NC, CA, and now NJ)

Based on Howell's documentation on this, the programing for this TBI kit cannot be altered if you want to stay emissions legal. What I can't tell from their info is whether this is a one size fits all application or of they have dialed it in for each engine size this will potentially go on. I wondered if anyone had any actual experience specifically with their carb legal kit on a 360?

Thanks

[FSJ Guy]

I don't know why Howell lists it for 72 - 93. That makes no sense. There were no more amc360s past 91. The PDF link is for the 6 cylinder and it says only through 81. I'd hate to buy it and be told that it's not valid for your year.

[87 Money Pit]

I don't know why Howell lists it for 72 - 93. That makes no sense. There were no more amc360s past 91. The PDF link is for the 6 cylinder and it says only through 81. I'd hate to buy it and be told that it's not valid for your year.

Thanks Ethan ... that's exactly where I was going with this

[87 Money Pit]

Bounce / anyone see this?

Changed title of the post to reflect the real question. Any feedback about what Ethan and I have noticed?

I don't know why Howell lists it for 72 - 93. That makes no sense. There were no more amc360s past 91. The PDF link is for the 6 cylinder and it says only through 81. I'd hate to buy it and be told that it's not valid for your year.

[grand_wag_85]

What is the difference between the emissions legal kit and the non emission legal kit other than the $100 bump in the price?

[FSJ Guy]

What is the difference between the emissions legal kit and the non emission legal kit other than the $100 bump in the price?

AFAIK, it adds the VSS (Vehicle Speed Sensor) to the system. Maybe a heated O2 sensor?

This may help by activating the DFCO (Deceleration Fuel Cut Off) which leans the mixture when slowing down with your foot off the throttle. The ECM needs to know the speed you are going in order to activate this feature.

You can get the VSS from Jags that Run. Website: http://www.jagsthatrun.com

They have very fast shipping and it screws into your New Process transfer case in between the transfer case and the speedometer cable. It may also work on QuadraTrac cases, but I haven't tried.

[87 Money Pit]

bump

bump

[ajminla]

CA Air Resources Exemption Only for '72-'81

Ethan's right.

If you read the CA Air Resources Board Exemption, it specifically says it applies only to '72-'81 AMC's.
So Howell might be able to say that it works with later engines, but not in any way legal or truly applicable.