4.7 no spark

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May 4, 2009 | 02:57 PM

swisher3

Thread Starter

Newbie

Joined: May 2009

Posts: 1

Likes: 0

Model: Cherokee

4.7 no spark

I have a jeep grand cherokee 4.7 has no spark or pulse I do have fuel cheked and tested relays not the issue anyone have any thoughts
thanks in advance

May 4, 2009 | 09:46 PM

seed

Senior Member

Joined: Sep 2008

Posts: 772

Likes: 5

From: pa

Year: 2000

Model: Grand Cherokee

Engine: 4.0

CPS,PCM,ignition module

May 4, 2009 | 10:20 PM

ol"blue

CF Veteran

Joined: Mar 2009

Posts: 28,068

Likes: 6

From: Tenn. and Mich.

Year: 2004

Model: Grand Cherokee

Engine: 4.7L V8

Retrieving/Erasing codes

May 5, 2009 | 09:54 AM

BuckB91XJ

CF Veteran

Joined: Nov 2008

Posts: 6,989

Likes: 4

From: Oak Harbor, WA.

Year: 1987

Model: Cherokee

Engine: 4.0 liter RENIX I-6, DIY Cold Air Intake, 2.5 FM Exhaust, 3 Core Radiator

Does sound like CPS issue to me. you can unplug and plug it back in. This sometimes fixes it. You can also read it out at this plug with a meter to verify it good or bad. The plug is near the firewall on the driver's side. It's definitely worth verifying bad before you just pull it and change it. It's a PITA to get to and kinda spendy to buy a new one.