Spark Problems 93 Flareside
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Spark Problems 93 Flareside
1993 Ford Flareside 5.0 EFI (302), ever since I purchased it it's had a terrible misfire at 25 and 45 miles per hour, seems to get less severe around 55mph and up but it's still noticeably there, only getting around 200 miles to a tank of gas and always smells like it's running incredibly rich. Today went down to AutoZone and bought all new wires, plugs, cap and rotor and installed them, they told me the gap was .054 which seems a bit extreme but that's what I gapped the new plugs to. When pulling plugs I didn't notice any fouling or burnt oil, they just appeared to be worn, however the wires were causing arcing and the contacts on the distributor cap were visibly corroded, as well as the old rotor being pretty severely chewed. After replacing all of these, ran a tank of gas through this evening with STP Fuel Injector Cleaning Concentrate and still I have a check engine light, and still I have a misfire, and still I have terrible gas mileage. Don't know where to go from here, but any thoughts would be much obliged.
NitrogenTSRH
NitrogenTSRH
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Joined: Dec 2007
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From: Jacksonville FL
Ford Fuel Injection » How To Run a Self-Test
Depending on your area some auto parts stores will still pull OBD1 codes.
Depending on your area some auto parts stores will still pull OBD1 codes.
Fleet Owner
Joined: Aug 2005
Posts: 23,666
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From: Easton,Ks
The self test will tell you why the MIL is on and more than likely the part that needs to be changed.
If you do not want to use the way the link above in post #4 says then you can buy a code reader at an auto parts place or amazon.com for about $30.00. It will give the number of the codes and you will not have to count the flashes of the MIL in your cluster.
http://www.amazon.com/s/ref=nb_sb_ss...fix=Equus+3145
The Equus 3145 code reader:
/
If you do not want to use the way the link above in post #4 says then you can buy a code reader at an auto parts place or amazon.com for about $30.00. It will give the number of the codes and you will not have to count the flashes of the MIL in your cluster.
http://www.amazon.com/s/ref=nb_sb_ss...fix=Equus+3145
The Equus 3145 code reader:
/
Posting Guru
Joined: May 2007
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From: North Reading Mass
As suggested above pull the codes with a paper clip or jumper. On my 300 the gap is .044 but I run it at .05 since I have low resistance wires. I don't know what the gap is for the 5.0 but it should be on the VECI sticker on the radiator support. Don't rely on Autozone for info.
regards
rikard
regards
rikard
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Fleet Owner
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From: Easton,Ks
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Posting Guru
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From: Calverton
I thought the gap should be .044...been working for me
...besides the gap being maybe wrong, I had a similar symptom with the miss, and that turned out to be the oxygen sensor...try re-gap to .044
...besides the gap being maybe wrong, I had a similar symptom with the miss, and that turned out to be the oxygen sensor...try re-gap to .044
Posting Guru
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From: Calverton
Yes it would here's why, the gap increases on its own about 0.001 every 2000 miles or so due to wear. Too wide a gap puts a big demand, to jump the wider gap. That's why it is important to use the recommended gap when replacing the plugs, if the emission sticker is still under the hood, the gap is listed there. Someone with an intact sticker may post the correct gap.
Posting Guru
Joined: Dec 2009
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From: Calverton
Yes thanks, I'm going to change my gap when I can.
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