extreamly frustrated.... car wont restart when warm

[Khyron]

all good thoughts, I have swapped the starter 3 times to eliminate that possibility, and the battery is in the trunk. I sitll have to get the voltage regulator and have the battery tested, will attempt to get that done tomorrow.

[firefighter3931]

Trunk mounted batteries can cause problems if the installation is not properly set up.

-where is the negative wire grounded to ?
-what wire guage are you using ?

It could be as simple as a poor ground or too much resistance due to improperly specced wiring. The problem intensifies with the increased demands of hot restarts. 

I see that your total timing is 32-36* but what is the initial timing ?



Ron

[resq302]

well, if the battery is in the trunk that should eliminate any of the cell warping due to the heat build up of the engine.  However, like Ron said, you have to have a heavy enough battery cable to keep enough voltage to reach the engine for the positive cable.  The longer distance the wire is, the greater the resistance it has.  I would also double check the ground cable at the battery and make sure it has a nice clean connection.  Again, with the neg. cable, you want that to be as short as possible too.

[Khyron]

it's grounded to the frame through a hole in the trunk with a gromet, also it's 2 gauge all the way to the front, It was a battery relocation kit from summit, Im going to go to get new cable today or tomorrow, 1 gauge baby :-)

Ground is maybe 2 foot long.

[BrianShaughnessy]

it's grounded to the frame through a hole in the trunk with a gromet, also it's 2 gauge all the way to the front, It was a battery relocation kit from summit, Im going to go to get new cable today or tomorrow, 1 gauge baby :-)

Ground is maybe 2 foot long.

So to clarify...  it cranks very slow when the engine is hot?    If so it sounds like a bad ground...  old poontiacs had that problem.   Gotta clean all the connection spots and use star lock washers when possible cause they bite in.

How about the ground from frame to the engine block?    Usually there's only a little ground wire from the firewall to the back of the passenger side head / intake manifold because the main ground is from the battery to the driver side head / intake.    With the trunk kit,   that little ground is trying to feed enough juice to run a starter motor unless you upgraded.

[firefighter3931]

it's grounded to the frame through a hole in the trunk with a gromet, also it's 2 gauge all the way to the front, It was a battery relocation kit from summit, Im going to go to get new cable today or tomorrow, 1 gauge baby :-)

Ground is maybe 2 foot long.

The 2 guage positive wire isn't going to cut it. You need 1 guage or 0 guage 

You can use the 2 Guage positive wire as a secondary ground. I'd run that wire from the same frame mounting point that your current ground is mounted to all the way up to the engine block...a secondary ground directly attached to the battery will help. 


Ron

[Khyron]

ok, i'll give that all a try, thanks guys

[c00nhunterjoe]

I believe I used 0000 wire when I put my battery in the trunk. My ground goes from the battery to the wheel house using the existing hole that is in it.  I also added a......hmmmm, I think it was 00 wire as a ground from the engine block to the frame. I have no cranking issues cold or hot. I run a stock starter with heddman headers that actually touch the starter.