I just changed my plugs in my 2002 Bravada. They are the Bosch Platinum Plug, which do not need gapping. It started up ok, but then stalled, and wouldn't start at first. Now it starts, but runs at a slow idle, will not exceed 2 km an hour. I can crawl faster. I don't know why this is happening. Is there something that needs to be done after the plugs are installed ? Am I missing something ? thanks . joev

.40-.45 should be fine.

It depends on the plug. The OEM Bosch is pre-gapped. All others are 0.050 (50 thou) or 1.3mm.
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https://www.google.com/search?q=+Dodge+Caravan+3.3+liter+V6+Spark+plug+gap

..

There is a little controversy about this. Searching the web, the best explanation I see is:

he 0.061-0.068 gap comes from the Ford OEM Service DVDs for 2003, 04 & 05, for the 4.0L Explorer, Explorer Sport-Trac, Mountaineer & Ranger, originally equipped with the Motorcraft AGSF22PM plug. Interestingly, in 2005, the Mustang started using the same 4.0L engine. In that application, the engine was equipped with the AGSF24N plug (a hotter plug). The gap on the DVD is shown as 0.052-0.056 in.

Through 2002, all 4.0L SOHC plugs, according to the Ford DVDs, are gapped at 0.052-0.056, using AGSF22PP plugs as replacement plugs.

The 4.0L SOHC is a waste spark engine, which uses slightly different plugs on the left & right banks.

Replacement plugs are usually double platinum, suffixed PP so they can be
used on both banks.

On the 2006 and later Ford DVDs, all 4.0L SOHC plugs are gapped at
0.052-0.056 in.

On the Ford OEM parts site, the AGSF22PM plug isn't listed. The replacement
plug for 2003-05 4.0L engines is the SP400, which is shown as having a gap
of 0.052-0.056 in.

The sites for Autolite, Champion and Bosch all list replacement plugs, for
those years as having a gap of 0.054 in.

Bottom line, it looks like the original plugs in the 2003-05 engines, except
for the 2005 Mustang, were gapped at 0.061-0.068 in. Replacement plugs,
regardless of manufacturer, are gapped at 0.052-0.056 (0.054), regardless of
electrode type (iron, copper, platinum, double platinum, or iridium.

.054 inch.

One of the best plug for the 4.0 V6 is the Bosch Platinum Part number 5256-05252087. These plugs come pre-gapped so you don't need to worry about that. The bad thing is, they're almost $5.00 each. In case you buy a plug that does need to be gapped, like the Platinum Plus plug, the gap is 0.054 in.
Good luck and Happy New Year,
Bill

The spark plug gap should be posted on the emissions sticker under the hood. The gap setting posted on the sticker is good for all brands and types of plugs for your vehicule

These engines use platinum plugs-you don't gap these type of plugs because you will damage te platinum electrode and cause misfire problems. Make sure you use bosch platinum factory recommended plugs and if he vehicle has more than 75k i would recommend replacing your plug wires as well/

Should have platinum plugs which require no gapping.

If you buy platinum plugs, which is all that should be run in that car, then the gap is set and you should not gap them differently. Gapping platinum plugs can knock the small platinum slug out of the plug. Just buy the right ones a and put them in.

0.54 is the gap for the plugs