spark plugs are white
- Thread starter dadiesel5
- Start date
http://www.dragstuff.com/techarticles/reading-spark-plugs.html
Look through these articles. The links are at the bottom. Lets you know how to read your plugs.
Look through these articles. The links are at the bottom. Lets you know how to read your plugs.
BigHairyMonkey
Founding Member
please tell me you mean 0.035 and even then, your plugs should be gapped at .054. oh and your running lean
302RollinHard
New Member
Did you relocate the coolant temperature sensor when you rebuilt the engine i.e. moved it to the back of the intake? That can cause you to run lean.
By having a bigger gap you force the spark to jump further thus giving you a bigger spark for igniting. BUT, too big a gap and you will blow out the spark before ignition.
It seems pretty much to be a standard of a .054 gap as previously stated
this should help it's from ngk
http://www.ngksparkplugs.com/techinfo/spark_plugs/installation.asp?nav=31300&country=US#installing
3. Gapping
Since the gap size has a direct affect on the spark plug's tip temperature
and on the voltage necessary to ionize (light) the air/fuel mixture, careful attention is required. While it is a popular misconception that plugs are pre-gapped from the factory, the fact remains that the gap must be adjusted for the vehicle that the spark plug is intended for. Those with modified engines must remember that a modified engine with higher compression or forced induction will typically require a smaller gap settings (to ensure ignitability in these denser air/fuel mixtures). As a rule, the more power you are making, the smaller the gap you will need.
A spark plug's voltage requirement is directly proportionate to the gap size. The larger the gap, the more voltage is needed to bridge the gap. Most experienced tuners know that opening gaps up to present a larger spark to the air/fuel mixture maximizes burn efficiency. It is for this reason that most racers add high power ignition systems. The added power allows them to open the gap yet still provide a strong spark.
With this mind, many think the larger the gap the better. In fact, some aftermarket ignition systems boast that their systems can tolerate gaps that are extreme. Be wary of such claims. In most cases, the largest gap you can run may still be smaller than you think.
http://www.ngksparkplugs.com/techinfo/spark_plugs/installation.asp?nav=31300&country=US#installing
3. Gapping
Since the gap size has a direct affect on the spark plug's tip temperature
and on the voltage necessary to ionize (light) the air/fuel mixture, careful attention is required. While it is a popular misconception that plugs are pre-gapped from the factory, the fact remains that the gap must be adjusted for the vehicle that the spark plug is intended for. Those with modified engines must remember that a modified engine with higher compression or forced induction will typically require a smaller gap settings (to ensure ignitability in these denser air/fuel mixtures). As a rule, the more power you are making, the smaller the gap you will need.
A spark plug's voltage requirement is directly proportionate to the gap size. The larger the gap, the more voltage is needed to bridge the gap. Most experienced tuners know that opening gaps up to present a larger spark to the air/fuel mixture maximizes burn efficiency. It is for this reason that most racers add high power ignition systems. The added power allows them to open the gap yet still provide a strong spark.
With this mind, many think the larger the gap the better. In fact, some aftermarket ignition systems boast that their systems can tolerate gaps that are extreme. Be wary of such claims. In most cases, the largest gap you can run may still be smaller than you think.
795.0pacecar
lover of pudgy polygamists
If its fuel injected, reading plugs is not an accurate way of determining whether or nor the engine is running lean unless you do a full throttle run, then immediately shut down the engine and check the plugs. EFI mustangs tend to run lean and have white plugs at idle and part throttle cruise to get the engine warm quicker, to reduce fuel usage, and for emissions. The only way to know for sure if the engine is running lean is by using a wide band O2.
A fuel pressure regulator is a band aid what wont work for long because the computer will adjust out any small changes in the fuel pressure, by adjusting the fuel injector duty cycle.
A fuel pressure regulator is a band aid what wont work for long because the computer will adjust out any small changes in the fuel pressure, by adjusting the fuel injector duty cycle.
you didn't mention what yr your stang was but from 89 - 93 gt or lx
ngk recomends plug ur45 with a .o54 gap
ngk spark plug http://www.ngksparkplugs.com/apps/car_truck_suv/default.asp?nav=60000&country=
this site gives you 3 options for ngk and none of the options suggest using the fr5.
http://www.sparkplugs.com/results_app.asp?productTypeID=1&AAIA=1133985
are you sure you have the right plug?
ngk recomends plug ur45 with a .o54 gap
ngk spark plug http://www.ngksparkplugs.com/apps/car_truck_suv/default.asp?nav=60000&country=
this site gives you 3 options for ngk and none of the options suggest using the fr5.
http://www.sparkplugs.com/results_app.asp?productTypeID=1&AAIA=1133985
are you sure you have the right plug?
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