Have a miss. Codes are p0302, p0305,p0171, p1000 in that order. Changed plugs and wires clean the mass air flow, no change.
Jul 25, 2016 at 4:20 PM
codes p0302, p0305,p0171, p1000
1997 FORD EXPLORER
DAN2002
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- 9 POSTS
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SATURNTECH9
- ✓ASE Certified Mechanic
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So is the miss only at idle and while driving down the road you cannot feel it?
Jul 25, 2016 at 5:54 PM
both.
Jul 25, 2016 at 6:33 PM
SATURNTECH9
- ✓ASE Certified Mechanic
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Is it a constant miss like those two cylinders are not firing? or does the miss come and go?
Jul 25, 2016 at 6:53 PM
the miss is mainly at idle, but you can feel it a like when driving.
Jul 26, 2016 at 2:02 PM
ASEMASTER6371
- ✓ASE Certified Mechanic
- 52,796 POSTS
good afternoon,
the first thing I would do is verify fuel pressure. with the lean code. I would make sure the fuel pump is pumping the correct pressure. you can rent a tester at a parts store to check.
Roy
the first thing I would do is verify fuel pressure. with the lean code. I would make sure the fuel pump is pumping the correct pressure. you can rent a tester at a parts store to check.
Roy
Jul 26, 2016 at 3:17 PM
Checked the fuel pressure and it is getting the correct amount of pressure. It is getting 40 psi running with switch on 29 psi.
Jul 26, 2016 at 5:46 PM
SATURNTECH9
- ✓ASE Certified Mechanic
- 30,869 POSTS
I would be looking for a vacuum leak with the p0171. it is more then likely a vacuum leak.
Jul 26, 2016 at 8:18 PM
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