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> Car runs hot, Temp gauge in center console nearly in the red
Daiberl
post Aug 12 2012, 09:43 PM
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Hello,

I need some help, I finally fixed all my vacuum leaks, the car idles fine, have a Hot Spark installed, and timing seems to be OK. Today I drove the car a bit and after a while the temp gauge indicated that the car is running hot, the needle moved over the P of TEMP before I decided to stop and take a break. After 30 minutes I started the car again and drive immediately home, needle again indicated that the car is running to hot.

Before I fixed all vaccum leaks the car was running like ... but the temp stayed consistent in the middle, so I assume the gauge is fine.

What to check, the knob on the ECU is already all the way to rich.

- Juergen
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kerensky
post Aug 12 2012, 09:56 PM
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QUOTE(Daiberl @ Aug 12 2012, 07:43 PM) *
Before I fixed all vaccum leaks the car was running like ... but the temp stayed consistent in the middle, so I assume the gauge is fine.
Check for simple things first, like a plastic Wal-Mart bag sucked into the fan. Slipping or broken fan belt. Is all of the cooling tin in place?
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Daiberl
post Aug 12 2012, 10:00 PM
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QUOTE(kerensky @ Aug 12 2012, 08:56 PM) *

QUOTE(Daiberl @ Aug 12 2012, 07:43 PM) *
Before I fixed all vaccum leaks the car was running like ... but the temp stayed consistent in the middle, so I assume the gauge is fine.
Check for simple things first, like a plastic Wal-Mart bag sucked into the fan. Slipping or broken fan belt. Is all of the cooling tin in place?


All cooling tin in place, fan is working and free of all backs and so on (IMG:style_emoticons/default/sad.gif)
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messix
post Aug 12 2012, 10:02 PM
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it's been sitting for a while.... any mouse houses in the tin?
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kerensky
post Aug 12 2012, 10:03 PM
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Have you driven extensively since installing the hot spark device? Could a connection at the temp sensor have come loose or just not be completely making good contact?
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Daiberl
post Aug 12 2012, 10:12 PM
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QUOTE(messix @ Aug 12 2012, 09:02 PM) *

it's been sitting for a while.... any mouse houses in the tin?


No mice in the tin, we have cats around the house (not ours) and the garage is always closed, I believe it's something technical and it started after installing the Hot Spark. I don't want to switch back to points, the car idles really fine when warm now, not as previous with 1600 RPM. Also have a new engine wiring harness from Jeff Bowlsby installed, all new vacuum hoses. What else can make the car run hot and nearly into the red?
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messix
post Aug 12 2012, 10:15 PM
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we're talking oil temp right?
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Daiberl
post Aug 12 2012, 10:28 PM
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QUOTE(messix @ Aug 12 2012, 09:15 PM) *

we're talking oil temp right?


Yes, oil temp, the standard gauge in the center console.
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messix
post Aug 12 2012, 10:59 PM
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QUOTE(Daiberl @ Aug 12 2012, 09:28 PM) *

QUOTE(messix @ Aug 12 2012, 09:15 PM) *

we're talking oil temp right?


Yes, oil temp, the standard gauge in the center console.

recheck timimg, oil level, running 10-40 oil? the cooling flaps in the full open position?
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Daiberl
post Aug 12 2012, 11:21 PM
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I will re-check the cooling flaps, oil is 10-40, oil level at the top of the scale. Timing checked now 3 times, maybe I need some help checking it again just to make sure it's really OK.
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euro911
post Aug 13 2012, 01:57 AM
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I'd double-check all the vacuum hoses for proper routing and connections first.
Are there two ports on the vacuum canister on your distributor?
Are the advance and retard hoses plugged into the correct ports?

I'd also try reinstalling a set of regular contact points in the distributor just to eliminate the 'Hot Spark' module as a possible cause, although changing to a solid-state point system shouldn't create overheating issues.
Does the engine pre-detonate (ping) on hard acceleration?
If so, try retarding the timing a few degrees.

Another item you might check out is the pot (potentiometer) for the richness control. It could have gotten some debris in it and not providing the ECU the proper voltage level (think dirty volume control on an old 1970's era radio) (IMG:style_emoticons/default/idea.gif)
Try turning it back and forth several times to see if it cleans up the wiper.
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TheCabinetmaker
post Aug 13 2012, 04:08 AM
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First, you don't state the year and engine size. Second, the timing"seems" ok? Did you actually time it with a light? "seems ok" isn't good enough. Changing to a "hot spark"won't make the engine run hotter. Running it advanced will.
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hot_shoe914
post Aug 13 2012, 05:10 AM
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I had this problem was. Turned out to be a simple fix. I unplugged the temp guage and it has never run hot since. (IMG:style_emoticons/default/poke.gif)
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rnellums
post Aug 13 2012, 07:02 AM
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I had my temp gauge do this once and it ended up being a bad ground at the gauge.
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76-914
post Aug 13 2012, 07:38 AM
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Assume nothing! Check the oil temp with a known working instrument e.g. an IR thermometer aimed at the pan where the sending unit goes, your wife's cooking thermometer, anything. Just don't assume. (IMG:style_emoticons/default/agree.gif) with Curt on the timing. Also, recheck your valves. Better too loose than tight. (IMG:style_emoticons/default/beerchug.gif)
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Daiberl
post Aug 13 2012, 08:24 AM
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I will have time again on Wednesday to work on the car (btw, it's a 1974 LE with matching engine), I have to fly to Chicago utnil tomorrow evening so no Teener wrenching. Advance port on distributor is connected, retard not just as it was from factory. Distributor is rebuild with brand new points, ... Plan is now:
  • re-check timing
  • re-check vacuum hoses
  • check cooling flaps
  • do valve adjustment
If that doesn't help I will install points again and will check
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poorsche914
post Aug 13 2012, 10:17 AM
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QUOTE(Daiberl @ Aug 13 2012, 10:24 AM) *
... (btw, it's a 1974 LE with matching engine) ...

If you haven't already, be sure to have Jeff Bowlsby add it to the Can Am Registry

(IMG:style_emoticons/default/driving.gif)
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Daiberl
post Aug 13 2012, 10:50 AM
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QUOTE(poorsche914 @ Aug 13 2012, 09:17 AM) *

QUOTE(Daiberl @ Aug 13 2012, 10:24 AM) *
... (btw, it's a 1974 LE with matching engine) ...

If you haven't already, be sure to have Jeff Bowlsby add it to the Can Am Registry

(IMG:style_emoticons/default/driving.gif)


It's in the registry since I found it 3 years ago after being in storage for 20+ years.
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JRust
post Aug 13 2012, 11:39 AM
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I know you said the ECU is turned to rich? How do you plugs look? It may just be running to lean. Doesn't the MPS control the fuel ratio more than the ECU? I obviously don't know jack $hit. My LE is running hot too & I know it is because it is running lean. Mine really only get's hot on the freeway in warm weather though. I've heard of using a potentiometer to make sure it is getting the right signal for fuel. I don't know how to do that though (IMG:style_emoticons/default/confused24.gif) . I'll be watching your thread to see what you figure (IMG:style_emoticons/default/evilgrin.gif). Although I am getting damn good MPG at 32!
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Drums66
post Aug 13 2012, 11:48 AM
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....Those (temp guage)are not very accurate to begin with! did you even
mess with the timing??
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