86 thunderbird 5.0 HO misfire in #2


Asked by Jul 17, 2014 at 12:38 AM about the Ford Mustang

Question type: Maintenance & Repair

i have a misfire in cylinder # 2 at idle and low rpm. i have replaced the spark plugs and
checked the gaps on them (.045), changed the injector and o-rings, wires, coil,
distributor cap and rotor, upper manifold gasket, throttle body and EGR gaskets,
checked and replaced almost all vacuum lines, purge valve and still having the
problem. the misfire is followed up by a ping in the exhaust and only does it at idle and
low rpms. if i remove the spark plug wire for cylinder #2 the ping in the exhaust goes
away and the car seems to be running smoothly like there was never a miss at all.
when i removed the EGR there seems to be coolant in it as well.

4 Answers

Tom Demyan

If coolant is in the EGR, the throttle body gasket to the EGR plate is compromised and needs to be replaced. Some people take the coolant lines that go to the spaces and plug them. So you are leaking coolant into your engine and burning it, and that might be giving you your misfire code.

Tom Demyan

FEL-PRO Part # 70261 Throttle body to EGR valve = $2

Tom Demyan

When you replaced the throttle body, I assume you replaced this gasket? If you did, then I'd suggest doing a leak down or compression check of all cylinders.


I timed it last night and it seemed to help alot then it started to act up again and now there is no power in any gear and it will spit and sputter and the car will drop really low in rpms and cut out

Your Answer

Add photo

Related Questions


Looking for a Used Mustang in your area?

CarGurus has 41,260 nationwide Mustang listings starting at $900.


Search Ford Mustang Questions

Ford Mustang Experts

#1 Tom Demyan
Tom Demyan
Reputation 3,770
#2 FordNut
Reputation 1,220
#3 carGrrl
Reputation 890
View All

Related Models For Sale

Used Chevrolet Camaro"
830 Great Deals out of 38,801 listings starting at $2,650
Used Dodge Challenger"
457 Great Deals out of 25,326 listings starting at $7,980
Used Dodge Charger"
656 Great Deals out of 29,890 listings starting at $1,995
Used Chevrolet Corvette"
422 Great Deals out of 20,178 listings starting at $3,688
Used Ford Mustang SVT Cobra"
5 Great Deals out of 316 listings starting at $5,999
Used Ford Shelby GT500"
4 Great Deals out of 773 listings starting at $24,980
Used Ford F-150"
3,219 Great Deals out of 216,434 listings starting at $1,900
Used BMW 3 Series"
1,632 Great Deals out of 39,406 listings starting at $888
Used Jeep Wrangler"
450 Great Deals out of 16,283 listings starting at $3,400
Used Ford Shelby GT350"
172 listings starting at $54,999
Used Chevrolet Silverado 1500"
2,489 Great Deals out of 143,840 listings starting at $1,995
Used Nissan 370Z"
73 Great Deals out of 3,049 listings starting at $11,990
Used Nissan 350Z"
103 Great Deals out of 1,558 listings starting at $2,895
Used Honda Accord"
1,344 Great Deals out of 77,641 listings starting at $1,395
Used Chrysler 300"
585 Great Deals out of 21,017 listings starting at $1,490