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Search: Posts Made By: bsterling
Forum: 4.0 SOHC / 4.0 OHV Tech 04-22-2015, 06:43 PM
Replies: 4
Views: 1,774
Posted By bsterling
Re: 2000 Ranger 4.0 ohv fuel trims out of whack

Jswifto,

That's what I've been fearing. I read some suggest tightening the heads and intake manifold down in sequence and others said it wasn't necessary. I didn't, tightened heads then manifold....
Forum: 4.0 SOHC / 4.0 OHV Tech 04-22-2015, 04:04 PM
Replies: 4
Views: 1,774
Posted By bsterling
Re: 2000 Ranger 4.0 ohv fuel trims out of whack

I have attached a graph showing short and long term fuel trims for both banks, compared to rpm. Are there any obvious things to look at based on this?
Forum: 4.0 SOHC / 4.0 OHV Tech 04-21-2015, 03:42 AM
Replies: 4
Views: 1,774
Posted By bsterling
2000 Ranger 4.0 ohv fuel trims out of whack

I've owned this truck for two years, and lately it's been throwing 171 and 174 codes, and occasionally a misfire code. Looks like previous owner deleted the egr. I pulled the heads and both were...
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