Will not turn over?

THEROG

MEMBER
1987 NISSAN HARDBODY
6 CYL
2WD
MANUAL
220 MILES

Changed valve cover gasket, reassembled, it started, ran erratically, found the vacuum hose not connected to air cleaner housing. Attached it and now it will not turn over at all. Have rechecked all the vacuum routing and assembly 3 times. Everything is in order. Checked spark with multimeter, all good there and definitely getting gas.

Friday, February 23rd, 2024 AT 6:25 AM

3 Replies

BORIS K

MECHANIC
836 POSTS

Hello,

Have you checked battery condition and terminals?

I would suggest to first check that battery is fully charged and that the terminals
clean and secure.

see some reading material:
https://www.2carpros.com/articles/everything-goes-dead-when-engine-is-cranked
and
https://www.2carpros.com/articles/how-a-starter-and-solenoid-works

Cheers, Boris

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Friday, February 23rd, 2024 AT 8:17 AM

THEROG

MEMBER
17 POSTS

Everything is in working order, put a multimeter on battery, alternator, coils, starter, all reading 12+
everything goes it just won't grab and commit.

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Friday, February 23rd, 2024 AT 3:34 PM

BORIS K

MECHANIC
836 POSTS

Hello,

So the engine is not cranking over? Or is engine cranking but will not fire?

You have 12V at starter solenoid, have you checked if you also get 12V at the starter solenoid exciter wire when cranking the engine?

See diagram below, for an 1989 Nissan Hardbody VG30.
The 12V from ignition switch is routed through the starter interlock rely to the starter solenoid.
The starter solenoid is grounded via the clutch switch.

Cheers, Boris

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