Question about 1998 Ford Explorer

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My 98ford explorer is not holding 2500 rpm for the smog test.only has 50,000 miles

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Could be a lot of things, but not holding rpm's can tell you a few things. I would do a few basic air/fuel mixtures test.
1. Check fuel pressure on fuel rail
2. Check Dirty Sensors( o2, Maf, Coolant, Air Temp), all these matter in the fuel air mixture.
3. Vacuum Leaks

Posted on Mar 09, 2015

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Posted on Jan 02, 2017

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SOURCE: no power ford explorer

weak transmission

Posted on Dec 06, 2008

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50,000 mile service


48,000 miles or 48 months
Maintenance Service Schedule 2007 dodge
Change engine oil and engine oil filter
Rotate tires
Lubricate drivetrain / steering / suspension
grease fittings (if equipped)-except Powerwagon
Lubricate front drive shaft fitting
(2500 / 3500, 4X4 & Powewagon)
Lubricate tie rod end links - Powerwagon
Check automatic transmission fluid level
Check manual transmission fluid level
Check the coolant level, hoses and clamps
Inspect exhaust system
Inspect brake hoses and brake linings
Inspect the CV joints/U-joints (if equipped) and
front suspension components
Check spare tire for proper pressure & correct
stowage
Lubricate outer tie rod ends 2500/3500 4X4

51,000 miles or 51 months
Maintenance Service Schedule
Change engine oil and engine oil filter
Lubricate drivetrain / steering / suspension
grease fittings (if equipped)-except Powerwagon
Lubricate front drive shaft fitting
(2500/3500, 4X4 & Powerwagon)
Lubricate tie rod end links - Powerwagon
Check automatic transmission fluid level
Check manual transmission fluid level
Check the coolant level, hoses and clamps
Inspect exhaust system
Inspect brake hoses
Inspect the CV joints/U-joints (if equipped) and
front suspension components

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