P0300,p0302,p0305,p0306 suggestions?

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Dec 29, 2014 | 08:51 AM

BlvdKreeper

Thread Starter

Senior Member

Joined: Jan 2011

Posts: 586

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From: northside chicago

Year: 1997

Model: Cherokee

P0300,p0302,p0305,p0306 suggestions?

2001 jeep cherokee xj with 150,000 on the dash. I did a full tune up about two months ago. I also replaced the TPS about a month ago. About two days ago I started getting high idle. So I cleaned the throttle body and idle control valve as well. When I finished and I started the xj the check engine started blinking and it stayed on. The idle went back to normal tho. Took it to autozone and p0300,p0302,p0305,p0506 came up. What should I do? Should I redo the plugs and wires again? Where would I be able to check for vacuum leaks? All the codes point to misfires

Dec 29, 2014 | 12:56 PM

CCKen

CF Veteran

Joined: Aug 2010

Posts: 8,357

Likes: 103

From: Canton, MI

Year: 1999

Model: Cherokee

Engine: 4.0

Quote:

Originally Posted by BlvdKreeper

2001 jeep cherokee xj with 150,000 on the dash. I did a full tune up about two months ago. I also replaced the TPS about a month ago.

About two days ago I started getting high idle. So I cleaned the throttle body and idle control valve as well. When I finished and I started the xj the check engine started blinking and it stayed on.

The idle went back to normal tho. Took it to autozone and p0300,p0302,p0305,p0506 came up. What should I do? Should I redo the plugs and wires again? Where would I be able to check for vacuum leaks? All the codes point to misfires

Clear the codes and see if they return. See if they are the same codes (cylinders).

What spark plugs did you install at the tune up?