Hard start when hot
#1
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Hard start when hot
There have been times after some spirited driving my Ls1 doesn't want to start. It turns over very slow. After 10-15 minutes of cool down it will start. The engine is cammed, Texas Speed CNC'd heads, and Kooks headers. Any thoughts? Is the starter getting too hot near the headers?
#2
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There have been times after some spirited driving my Ls1 doesn't want to start. It turns over very slow. After 10-15 minutes of cool down it will start. The engine is cammed, Texas Speed CNC'd heads, and Kooks headers. Any thoughts? Is the starter getting too hot near the headers?
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Thanks. While the Formula is 15 years old it only has 65K miles on it. I realize age can be a factor but usage shouldn't be. In your opinion is the starter weak and need replacement or could I get a heat shielding wrap to go around the starter?
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It's actually 5-6 years old however it's always had plenty of cranking power. It's an Optima Red top. During the winter it's always on a trickle charger. Maybe it's time to replace the starter, the Red top and the get a heat shield for the new starter. With the stock compression ratio I'm thinking an OEM starter should be OK.
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#9
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It's actually 5-6 years old however it's always had plenty of cranking power. It's an Optima Red top. During the winter it's always on a trickle charger. Maybe it's time to replace the starter, the Red top and the get a heat shield for the new starter. With the stock compression ratio I'm thinking an OEM starter should be OK.
And when a starter gets hot from radiant heat off the headerers...they usually will not even spin at all till they cool off. The heat doesn't just make them weak...they disable them completely while they are hot.
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#10
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In my 20+ years of stock car racing experience, its the starter. We always have hard start, slow cranking conditions after a race due to the starter being hot and the amount of ignition advance we run. We replaced the weak starter with a good high torque unit and problem solved. Our cars get a new optima battery almost every year.
You can have the battery tested but they need to use a high load on it to duplicate a hot engine.
You can have the battery tested but they need to use a high load on it to duplicate a hot engine.
#11
Not to hijack the thread but my engine is still stock and my car is difficult to start usually in the summer months. This issue has been going on for the last few years. First two or even three start ups during the day will work. Third or fourth and it will either crank for a while and start up or I give up, wait a second or two, try again and it will start up fine.
I did suspect the battery but I had it tested when I let it die during my suspension overhaul. I suspect either the starter or fuel pump but am leaning more towards the starter since the fuel pumps sounds like it is priming fine during start up and operates fine when the car is running. Or is there something else I need to look at?
I did suspect the battery but I had it tested when I let it die during my suspension overhaul. I suspect either the starter or fuel pump but am leaning more towards the starter since the fuel pumps sounds like it is priming fine during start up and operates fine when the car is running. Or is there something else I need to look at?
#13
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Not to hijack the thread but my engine is still stock and my car is difficult to start usually in the summer months. This issue has been going on for the last few years. First two or even three start ups during the day will work. Third or fourth and it will either crank for a while and start up or I give up, wait a second or two, try again and it will start up fine.
I did suspect the battery but I had it tested when I let it die during my suspension overhaul. I suspect either the starter or fuel pump but am leaning more towards the starter since the fuel pumps sounds like it is priming fine during start up and operates fine when the car is running. Or is there something else I need to look at?
I did suspect the battery but I had it tested when I let it die during my suspension overhaul. I suspect either the starter or fuel pump but am leaning more towards the starter since the fuel pumps sounds like it is priming fine during start up and operates fine when the car is running. Or is there something else I need to look at?
There is a difference... the first one is what is happening to to op.