Stock B2200 5spd. Restoring for my dad. The truck was running rough, and has 105k miles with factory plugs, wires, rotor & cap. SO I replaced all these with good parts from Rock Auto. Now, the engine will not start up. It just sputters during cranking. I have gone through everything thing I can think of including replacing the old parts. Any ideas of what to check??

Thanks,
BJ

 

1. I would check that you did knock knock any wires off the coil terminals.

2. Turn key to "Run" position and leave it there; check for voltage at Positive terminal at the coil.

3. I would check for spark in the spark plug wires using a strobe timing light, a simple spark test tool, or having helper crank the engine after you've stuck a bolt into the plug end of the spark plug wire while you hold that bolt about 1/16 inch from engine metal; then do similar with coil wire at its distributor end.

4. Check the spark plug wires firing order 1-3-4-2 first. Distributor pictures below, #1 on engine is front.




5. If all above all fails, I'd replace your old parts one at a time.

 

I check the new plug wires and spread out the prongs on each one and the one to the coils. now it fires up but runs really rough.

***Update***
pulled the new plugs from Rock auto and got some from Napa. Fired right up and runs smooth. Quality control!!

 

Can you let us know the brand of Spark Plugs that you bought from RockAuto.com?

 

I'd like to know if those RockAuto plugs were gapped (and you checked), or if you gapped them yourself.

I'd also like to know ohms resistance of the top terminal to the center electrode of the plugs. You may state what brand they were, and part number.

 

I did confirm the gap .032. I did not test resistance. maybe one of them will fall back to earth after I chucked them.

 

Interesting, I use NGK plugs myself.

I use NGK 7734 (BPR5ES) gap 0.039-0.043 inch

 

I have never had good luck with the Platinum spark plugs in the Mazda trucks. I stick with the standard NGK like Cusser uses, and I have used the Motorcraft standard style plugs before with good results. I think most of these trucks are in a higher mileage category, and the platinum plugs seem to not like deposits of any kind. Maybe if the ignition system had a much higher voltage spark than stock, they may like that better. Just my 2 cents.

 

i used BPR5ES. and they work great