Engine won't turn over when outside temperature is hot.

STEVESTEPHENS

MEMBER
1993 ACURA INTEGRA
1.8L
4 CYL
FWD
MANUAL
240,000 MILES

Problem:
Engine won't turn over when the temperature outside is hot. All electronics work and the car can be push started but it simply won't turn over when it's hot outside. When you turn the key, simply nothing happens. Later, when the outside temperature has cooled down the car starts with no problem. I can drive the car for miles kill it and it will immediately start again but, if I kill it and go inside a store while the car sits in the heat it won't turn over.

Things done so far that have not resolved the issue.
1. Main fuel replay has been replaced
2. Ignition switch has been replaced
3. Ground has been verified
4. New battery with plenty of cranking amps has been installed.
5. Starter Relay has been replaced

1 Reply

HMAC300

MECHANIC
48,601 POSTS

Because the ground is by the battery tray make absolutely positive there is no battery acid on it or the piece that it grounds to is good even though you said it's been verified. Then run a ground cable to engine from battery. Lot of times these issues come up because of that. Then have a starter draw done on your starter as it may be drawing to many amps when hot. Finally check resistance of POSITIVE cable from starter to battery as that may not be sending enough voltage through it due to age as well as battery acid going down the cable. Then if it continues have the battery checked for condition and load test even if it is new. It still could be bad.