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ok. so i am some what new to mazdas. this is my 2nd mx3 i have had. its a 93 gs i pulled the 1.8 out cuz my friend had a 2.5 out of his probe. lets say im not one to ask for help eather cuz i can most the time find out whats wrong myself but im lost. i got the 1.8 out and put the 2.5 in got it all pluged in. went to start it. im getting gas and spark. i am running the k8 ecm dizzy and vaf. but it will not try to start. it turns over. its putting 3 codes up that are 5 8 and 10. dose any one have any thought to what might be wrong. i am lost on this one. i thought i could do the swap and get it to run but im finding out it is harder then my hondas that i am use to lol. thanks for the help. let me know waht you think i should try. i have all the klde parts 2

We're more than willing to help but first check out what those codes mean ok then we'll talk.

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Looks like an issue with your VAF.

i have looked.
05 Knock sensor
08 Volume Air Flow sensor (VAF)
10 Intake air temperature sensor (IAT)

i have another knock sensor i can put on unless you can tell me how to text it.
the vaf is new
and i cant find the iat on this where is it. lol

It's in the VAF.

ok im going to sound stuped for a min. the vaf is maf right or wrong

ok update. i went out today and put the maf or vaf what ever it is on this car from the probe on. no check eng. light. im getting spark and fuel to the return line i know cuz i pulled that line off. what could make it not want to start. should i put the probe ecm and dissy on and try it

any one have any thoughts as to y it will turn over. get fuel and have spark. but not start. its not even giving me a check eng ligjt now. im lost and really need help

Use the dizzy from your Mazda and make sure your fuel lines are the right way round

i am using the k8 dizzy i think i have the fuel lines on the right way but i am going to go put them on the other way reall fast to see if that helps. be back in a few

Spark is good, but spark at the correct moment is what you really want. Check that #1Cyl is at TDC when it should be. Check that the rotor is pointing at #1 when #1 is at TDC.

how do i find out if number 1 is at dtc.

Turn the crankshaft until the timing marks on the pulley line up. At that point the #1 piston will either be at TDC compression or TDC exhaust. Remove the #1 spark plug and put your finger over the hole as you crank it around and you will feel the compression when you’re on the compression stroke. Once you know your at TDC on the compression stroke remove the disty cap an you should see the rotor pointed at the #1 pin on the disty.

If you can’t find the compression stroke there’s a good chance the timing belt in that engine has skipped and the valves are not closing at the right time. In that case, the spark is coming at the right time but the engine is timed wrong.

OR...the belt could have broken or stripped. In which case the cams are not turning at all which you can verify by cranking the engine over with the disty cap off. If it isn't turning your cams aren't turning.

we put a new belt on it and drove it around befor we pulled the motor out of the probe. is there any way to get the dizzy on 180 out

it's possible but very unlikely. I've seen it done, but they must have had a beeotch of a time getting it on that way. Worth checking though.

Going back to a previous post, when I installed my ZE I accidentally installed the fuel lines backwards. I never heard the fuel pump running because the pressure side was blocked by the FPR and the pump would immediately cut out because it would immediately pressure up. I jumpered the FP so I knew it was running and removed the pressure side hose and nothing was coming out...because it was actually the return hose. Switched them around and it fired immediately.