4.6 Stroker Build

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vashxj
I made it to triple digits!
I made it to triple digits!
Posts: 193
Joined: August 10th, 2012, 8:46 pm
Stroker Displacement: 4.6
Vehicle Year: 1999
Vehicle Make: jeep
Vehicle Model: cherokee
Location: belvidere, il

Re: 4.6 Stroker Build

Post by vashxj »

the downstream doesn't matter it just tells the pcm if the cat is bad, could you possibly have a bad upstream o2 sensor?
redrider2911
Where's the "any" key?
Where's the "any" key?
Posts: 25
Joined: November 12th, 2009, 5:47 pm
Vehicle Year: 1994
Vehicle Make: Jeep
Vehicle Model: Cherokee

Re: 4.6 Stroker Build

Post by redrider2911 »

Thought I would update this. The upstream sensor I just got a few months ago was bad. Replaced it under warranty and now it runs perfect.
redrider2911
Where's the "any" key?
Where's the "any" key?
Posts: 25
Joined: November 12th, 2009, 5:47 pm
Vehicle Year: 1994
Vehicle Make: Jeep
Vehicle Model: Cherokee

Re: 4.6 Stroker Build

Post by redrider2911 »

Today I went through and installed new plugs, wires, and a coil. While I had it apart I went ahead and did a compression test. I was really surprised. 190-200 PSI ! I new my compression would be high because my dynamic compression ratio is so high. But still thought that was pretty significant over the stock 130-150 PSI.
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