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Author Topic:   Hard Cranking!!!

Posts: 4
From: colton, ca, usa
Registered: Feb 2002

posted 03-03-2002 05:14 PM     Click Here to See the Profile for Seth   Click Here to Email Seth     Edit/Delete Message   Reply w/Quote
Got a 69 Torino with a 390. The car will turn over but it's really struggling to. It doesn't turn over quick enough to start. The starter, solenoid, regulator, and battery are all new. None of them made a difference. Motor was just rebuilt, and isn't locked up. Took the plugs and it barely got easier. Can you help me? Thanks.

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Posts: 10683
From: Reno Nv USA MEM#1240
Registered: Apr 2001

posted 03-03-2002 06:27 PM     Click Here to See the Profile for Fastymz   Click Here to Email Fastymz     Edit/Delete Message   Reply w/Quote
Have you checked the timing.I know if the timing is way off it can make it hard to crank.


65 coupe,1969-351w,RPM intake,Carter625,shorty headers,2.5 exhaust, Flowmasters,C4,open 8" 2:80,Big Boss 429 hood scoop,Crager SS,Black Suede.

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V8 Thumper

Posts: 3267
From: Orange, Ca. United States of America
Registered: Dec 2001

posted 03-03-2002 06:57 PM     Click Here to See the Profile for V8 Thumper   Click Here to Email V8 Thumper     Edit/Delete Message   Reply w/Quote
New motor, hua? Fresh PAINT on the new motor?

Take the ground (-) wire off of where it bolts to the block, file or sand the paint off... while you're at it, freshen up those battery terminals too. Take two of these and call me in the morning

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Posts: 443
From: Clarion PA
Registered: Nov 2000

posted 03-03-2002 07:02 PM     Click Here to See the Profile for Rustang   Click Here to Email Rustang     Edit/Delete Message   Reply w/Quote
Thumper's on the right track! Also make sure you have good chassis ground and the motor is grounded to the chassis. You should also run a minimum of #2 battery cable. Clean all your connections and battery terminals. If you have a battery in the trunk you should run a minimum #0 wire. If you see any smoke when the things crankin' that's where your bad connection is!

'68 mustang 351 clevor- 10.92@124
'67 Stang, 351W -11.18@118
'69 351C Torino-14.90@100
'78 Pickup 351W-15.56@88
'79 Pickup 460 ET=??

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Posts: 1564
From: Sucat, Paranaque, Philippines
Registered: Jul 99

posted 03-03-2002 08:47 PM     Click Here to See the Profile for Fastback68   Click Here to Email Fastback68     Edit/Delete Message   Reply w/Quote
Are you sure the battery is big enough? Are you running an auto? I know one ex-idiot (me!) who had this problem with a 302 auto until he switched from a 2SM battery to a 3SM.

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Posts: 4
From: Bellevue Ne US
Registered: Feb 2002

posted 03-04-2002 12:10 AM     Click Here to See the Profile for 65351w   Click Here to Email 65351w     Edit/Delete Message   Reply w/Quote
I had the same problem with my 65 when I droped in my rebuilt 351w, new battery but did not have enough cranking amps to turn the engine over fast enough, got a battery with 800 cca and worked great.

65 coupe,351w 30over, Edlebrock RPM cam,Performer intake,T-5

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Posts: 4
From: colton, ca, usa
Registered: Feb 2002

posted 03-04-2002 08:16 PM     Click Here to See the Profile for Seth   Click Here to Email Seth     Edit/Delete Message   Reply w/Quote
Thanks for all the suggestions guys. The battery is an 840 with 525cold. About smoking when turning over, the solenoid relay did that until we replaced it, but it doesn't do that anymore. the grounds all look pretty good. So i'll try it again thanks.

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Posts: 32655
From: Saco, Maine
Registered: May 99

posted 03-04-2002 08:25 PM     Click Here to See the Profile for SteveLaRiviere   Click Here to Email SteveLaRiviere     Edit/Delete Message   Reply w/Quote
Perhaps your timing is too far advanced?

The engine was just rebuilt, huh? Does it turn over easily with a socket on the crank? Have you prelubed it? You're not doing your new cam any favors by not starting it easily.

I'd jump start it to get it fired right off, run the cam in, and then worry about the hard starting later.


'70 Mustang Mach 1 M code 351C 4V/FMX/3.25 open
'72 Mustang Sprint Coupe 351C 4V/FMX/4.30 Trac Lok
'94 F-150 XL 5.8L/E4OD/3.55 Limited Slip

MCA Member # 47773

Every one needs to believe in something. I believe I'll have a beer!

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Posts: 1202
From: Athens,GA
Registered: Jul 2001

posted 03-05-2002 12:19 AM     Click Here to See the Profile for bluestreek   Click Here to Email bluestreek     Edit/Delete Message   Reply w/Quote

If the engine turns over OK with jumper cables, then the extra juice may be overcoming a ground problem. If it still turns over hard, then your timing is wrong or advanced too far.

When I moved my battery to the rear, I encountered the same problem. I thought my battery or starter was bad but before replacing them, I got the biggest and shortest ground cable, and a heavy duty flatwound ground-strap, at the autoparts store. I connected the battery ground cable to a well sanded place on the body, and then took the ground strap and connected one end to a clean solid connection on the firewall, and the other end to a bellhousing bolt. Afterwards, my engine turns over better than ever.

Good luck,

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Posts: 244
From: mountain home, idaho
Registered: Sep 2001

posted 03-05-2002 09:00 PM     Click Here to See the Profile for thedave66   Click Here to Email thedave66     Edit/Delete Message   Reply w/Quote
this may be a little late, but I had the same problem on my 289. turned out the starter was fried. Got a new one haven't had a problem since.


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