Engine crank, no start. Solved!!!! - Mazda3 Forums : The #1 Mazda 3 Forum
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post #1 of 5 (permalink) Old 03-09-2019, 03:47 PM Thread Starter
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Engine crank, no start. Solved!!!!

Hello.
I just completed my engine swap. 2007 Mazda 3 with 2.3l to a 2015 Fusion 2.5l engine. I have spark, fuel, but no start. Engine cranks over just fine. I did not change the intake cam, as it was the same as the 2007 cam.
I used the cam alignment tool as well as the SST inserted into the side of the engine when installing the crank pully. Is there a way to screw this up? Is there a way to check the crank position sensor or the cam position sensor?
Any thoughts?
Thanks!

Update...Just checked the cam timing. It's good. Crank pulley aligned with small bolt in place, cams in compression position and room for SST to fit in to align the cam shafts. I guess you can't screw that up if using the proper tools.

So....Crank position sensor, cam position sensor? I'm at a loss. Do those components wear or break easily? Is there a way to check them? Can I check for voltage with key on?

2007 Mazda 3s
Speed limit? What speed limit?!

Last edited by Billistic4; 03-12-2019 at 12:19 AM. Reason: Solution
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post #2 of 5 (permalink) Old 03-11-2019, 12:00 AM
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Originally Posted by Billistic4 View Post
Hello.
I just completed my engine swap. 2007 Mazda 3 with 2.3l to a 2015 Fusion 2.5l engine. I have spark, fuel, but no start. Engine cranks over just fine. I did not change the intake cam, as it was the same as the 2007 cam.
I used the cam alignment tool as well as the SST inserted into the side of the engine when installing the crank pully. Is there a way to screw this up? Is there a way to check the crank position sensor or the cam position sensor?
Any thoughts?
Thanks!

Update...Just checked the cam timing. It's good. Crank pulley aligned with small bolt in place, cams in compression position and room for SST to fit in to align the cam shafts. I guess you can't screw that up if using the proper tools.

So....Crank position sensor, cam position sensor? I'm at a loss. Do those components wear or break easily? Is there a way to check them? Can I check for voltage with key on?
I replied on my other thread that you posted on. See that. But since I'm here..... when you verified, did you verify top dead center on #1 cylinder with a long screwdriver or with the SST in the block when the cams and crank pulley are lined up? This is where people mess it up. The crank could be off in relation to the pulley. Can happen when torquing the bolt and the pulley and crank are not held in place. I see where you mentioned the block SST in the beginning but not when you said you verified.

Again, see other thread and check my questions about other things.

BTW, Good job on doing the swap. You got the hard part out of the way. We should be able to figure it out at this point.

Jesus Saves

Last edited by rickkari; 03-11-2019 at 12:02 AM. Reason: Added compliment.
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post #3 of 5 (permalink) Old 03-12-2019, 12:21 AM Thread Starter
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I re-verified cam, crank timing with the proper tools today. All good. I watched a 3 part video, that StrangeDuck posted, that goes over in detail how to time the cam, crank shafts and how one can screw it up. At least I got that one right!

In my last desparate act, I swapped out the FORD spark plugs for the original MAZDA plugs. I was thinking that since it was a Ford engine , that I should use the Ford spark plugs. Wrong! Apparently the Mazda ignition system did not like that! Started right up! I feel like a dumbass for making that mistake, but I hope someone else will read this and know better!

The fuel pump was the original problem on this car. I did not troubleshoot it myself after I bought it. I just went by the compression readings taken by some shop. I didn't find this out ( that the fuel pump was bad), until after the engine swap was complete. Fuel pump fuse blown. Replaced the fuel pump and it worked for about a day, so they are sending me a new fuel pump.

I read rickkari's entire thread regarding the swap with newer engines. It was great and a huge help. The only difference between mine and his was that I did not have to modify the valve cover to fit the VVT solenoid rubber bushing. Mine was a straight swap. I used the 2.3L intake manifold with adapter plate. The IMRC plunger got stuck on the intake adapter plate. A little filing took care of that. I'll get to actually start it up and run it this weekend as the fuel pump will arrive before then.

Thanks again everyone for your collective experience! These forums are priceless!
theblooms and lonnzo79 like this.

2007 Mazda 3s
Speed limit? What speed limit?!

Last edited by Billistic4; 03-12-2019 at 12:29 AM.
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post #4 of 5 (permalink) Old 03-17-2019, 10:11 PM
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Originally Posted by Billistic4 View Post
In my last desparate act, I swapped out the FORD spark plugs for the original MAZDA plugs. I was thinking that since it was a Ford engine , that I should use the Ford spark plugs. Wrong! Apparently the Mazda ignition system did not like that! Started right up! I feel like a dumbass for making that mistake, but I hope someone else will read this and know better!
Just to note. The plugs for a 2015 Ford Fusion 2.5 and a 2007 Mazda 3 2.3 are interchangeable. You can verify this on Rockauto. Can't explain what happened with yours and am not going to argue about it, but the original Ford Fusion 2.5 plugs are compatible with the Mazda 3. There shouldn't be a a issue unless the 2.5 ones are shot or are not stock and proper. If the Ford plugs are in good shape and are verified to be the right plugs for the 2.5, I would be curious to see if it won't start again if you swap them back since it is now running just to verify it was the plugs and not something else that is now working properly.

Jesus Saves
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post #5 of 5 (permalink) Old 03-19-2019, 03:29 PM Thread Starter
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I did not actually verify that the Ford plugs were correct for the 2.5 engine. They came with the engine when I bought it. Another mistake on my part. I threw out the old Ford plugs, so I can't test them now. I'm quite certain the plugs were the problem though as they were the only thing that I changed after verifying the crank, cam timing. Thanks for the info. I learned a lot on this project and made a few mistakes. The car runs great!

2007 Mazda 3s
Speed limit? What speed limit?!
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