Sounds good. Uhhh...our trucks don't have a mass airflow sensor.
- Bernd
At 12:52 PM 01/18/2000 -0500, you wrote:
>My truck used to ping. 1998 Extended Cab, 3.9l V6, 5 speed (Let me know
>if anyone wants more info). I noticed that the problem got worse when I
>put a 3" lift kit on my truck. It actually got to the point that I could
>feel the engine "jerk" when I drove up a hill on interstate 71 in fifth,
>while lugging the engine. I started running 89 octane, which made the
>pinging go away somewhat. I then dedided to replace the spark
>plugs. When I pulled the old ones out, I noticed that they had very long
>electrodes. Something like a half an inch. I felt that they were way too
>hot, so I replaced them with colder plugs. The pinging got a little bit
>better, but it was still there. So, I decided start playing with the air
>intake. The flexible tube had gotten a little kinked as a result of the
>lift, so I looked into getting a K&N intake setup. Since they don't (or
>didn't) make one for a 98 V6, and since the air mass sensor is located in
>the throttle body, I decided to just rip off the whole air system from the
>flexible tube back. I bought a K&N canister filter (PN RU2820) with a 3.5
>inch diameter whole, 6 inches long, and about 5 inches in diameter. I
>clamped it directly to the intake housing. The pinging is gone. I can
>take the same hill that I used to ping like crazy on, and floor it in
>fifth gear and get *no* pinging. Looking back, I feel that what was
>happening was too little air was being taken into the cylinder, therefore,
>too little gas was injected. This leads to a lean charge in the cylinder,
>which in turn is easier to ignite (via too hot a spark plug). I may be
>crazy, but it worked for me... total cost... 6 1.29 dollar spark plugs
>(Bosch, forget the Chumpion crappy ones) and a 35 dollar K&N cannister
>filter. Not too shabby.
>
>Dave
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