Will not crank

DILL-11

MEMBER
1992 MAZDA MIATA
1.6L
4 CYL
2WD
MANUAL
170,000 MILES

Would not crank, put in new fuel pump it cranked. Then let it sit from about three months now it will not start again. Put in another fuel pump no start. It is getting fuel and a little fire. Checked all fuse and relays changed coils. When you try to crank it, it hit but will not crank. Could this be the computer or crank sensor or what?

6 Replies

STEVE W.

MECHANIC
13,475 POSTS

Drain the fuel system, put in new gas with some seafoam or techron cleaner in it. Change the fuel filter and test the fuel pressure and output. Check over all the wiring for rodent damage as well.

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Saturday, February 25th, 2017 AT 4:40 AM

DILL-11

MEMBER
126 POSTS

Have drain the gas and put new gas in and filter. Do you think with little fire sometimes it could be the ignition module? Also put new plugs in.

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Saturday, February 25th, 2017 AT 7:46 AM

STEVE W.

MECHANIC
13,475 POSTS

Okay next step, go over all the connections for the ignition system and engine. If it is firing then stops it is likely to be a corroded or loose connection. Ignition modules normally work or not, they usually are not intermittent. See this a lot on cars that get stored for the winter.

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Saturday, February 25th, 2017 AT 8:07 AM

DILL-11

MEMBER
126 POSTS

What about the crank position sensor? I read this could cause this.

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Saturday, February 25th, 2017 AT 11:14 AM

STEVE W.

MECHANIC
13,475 POSTS

Crank sensors usually do not act intermittent until they get hot. Plus they do not normally fail from just setting for three months. Check the wiring first. It takes a mouse about three seconds to chew a wire enough that your car will not run. It also takes about a week for them to corrode enough to cause problems.