There is a common issue with 97+ 4.0's where the harness rubs on the fuel rail near the firewall. It randomly grounds out a wire (after rubbing through the insulation) and causes the same issue as a...
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Type: Posts; User: Mudderoy; Keyword(s):
Re: Idle problem still..
There is a common issue with 97+ 4.0's where the harness rubs on the fuel rail near the firewall. It randomly grounds out a wire (after rubbing through the insulation) and causes the same issue as a...
Re: Idle problem still..
TPS would be one possible sensor issue. I'm assuming all the 4.0 engines have them, I only have ever worked on 97+ models.