When extremely hot, Car dies at stop and no performance
07-02-2005, 04:02 AM
#1
When extremely hot, Car dies at stop and no performance
Well, it's been over 100 here in Austin the last few days and a few problems have shown themselves. They only happen in the heat of the day. In the morning, the car runs great. Crisp and willing to roll. Once the heat of the day comes about like on my way home from work, The car does not want to pick up idle and will sometimes stall. Or if it does idle, it will hunt between 600-1000. In the morning when it's 75-80 out, it idles at a solid 700-750 right where it should. Also, there is no performance at all. I know the A/C saps some of it but I swear a Geo Metro could out run it. It's awful. Slow to rev and just feels like I would go faster pushing it. I've already changed the injectors, Plugs, new o2 sensor, cleaned the TB, EGR and seaformed the motor.
Any Ideas?
Any Ideas?
07-02-2005, 04:19 AM
#3
that's sad that even with all of that maintainance you're having this problem. did the problem surcace after those things were replaced? i'd check for vacum leaks first since it seems to be firing correctly.
07-02-2005, 05:15 AM
#4
It's surfaced half way in the middle of all of this. I put the injectors and o2 sensor on it last year. Late that summer it happened once or twice. Figured it was nothing big so I just left it alone. Over the winter, I did all of the cleaning and changed plugs during my 100K maintence. The car only has 102K miles on it. Oh and 3 of the coilpacks were replaced too. Forgot about that. There were cracks in them so I replaced them for good measure.
Looks like I'll clean the connections, replace the vacuum lines, and test the KS over the long weekend. I could definately see a finely cracked vacuum line expanding from the heat and causing a leak.
Oh, and it's a VE. I didn't say that. 94 SE 5 Speed.
Looks like I'll clean the connections, replace the vacuum lines, and test the KS over the long weekend. I could definately see a finely cracked vacuum line expanding from the heat and causing a leak.
Oh, and it's a VE. I didn't say that. 94 SE 5 Speed.
07-02-2005, 05:35 AM
#5
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Originally Posted by bmw88rider
... cracked vacuum line expanding from the heat and causing a leak. ...
07-02-2005, 07:23 AM
#7
When you start the engine cold (and its cold out side) it should idle around 1500rpm and then drop down to 800 or so. So I would suggest cleaning the IACV out. Also check the contacts on you temp sensor for corrosion.
fyi, if you ever plan on using seafoam you should use it before you plan on changing the 02 sensor, since a ton of carbon gets flushed passed the 02 sensor and can plug it up.
fyi, if you ever plan on using seafoam you should use it before you plan on changing the 02 sensor, since a ton of carbon gets flushed passed the 02 sensor and can plug it up.
07-03-2005, 08:22 PM
#10
Injectors are factory new. The KS was bad (open resistance) and I put a resistor in there for the time being. (had one laying around) Cleaned all of the engine connectors and the engine purrs at idle once it stablizes and is running harder. The new tires are noisy when they sqwauk.
Still, It seems like it doesn't want to catch idle. During the test drive when I put in the clutch, It would fall as it should but would fall down as low as 300 RPM and then "catch" and stabilize at 700-750. This is at night when it's only 93 degrees out. It was doing this before and there seems like no changes in that behavior. I'm stumped.
Still, It seems like it doesn't want to catch idle. During the test drive when I put in the clutch, It would fall as it should but would fall down as low as 300 RPM and then "catch" and stabilize at 700-750. This is at night when it's only 93 degrees out. It was doing this before and there seems like no changes in that behavior. I'm stumped.
07-03-2005, 08:25 PM
#11
Check your vacuum lines directly connected to the intake.My odl saturn was doing this and it turned out that one of them was unplugged.Might not be the problem but surely worth checking.
Try using a propane torch also for a vacuum leak if it is a small slice in the hose.
Try using a propane torch also for a vacuum leak if it is a small slice in the hose.
07-03-2005, 08:31 PM
#12
That is my next step, A complete change out of the vacuum hoses. This is the last little bug I need to work out of the car then it will be running like a champ. But, it sure is annoying to pull up to a light and push the clutch in and have the thing stall. 
07-04-2005, 05:50 AM
#13
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Join Date: Dec 2004
Location: EU Scandinavia
Posts: 4,323
Originally Posted by bmw88rider
That is my next step, A complete change out of the vacuum hoses. This is the last little bug I need to work out of the car then it will be running like a champ. But, it sure is annoying to pull up to a light and push the clutch in and have the thing stall.
07-04-2005, 06:24 AM
#14
Actually found the other problem just now. I was doing a really close inspection of all of the vacuum lines and I must have just missed this before but the smaller hose off the back of the intake was completely missing. Looks like the guys that did my injectors completely forgot about it. So, I was losing manifold vacuum. That made things run 100 times better. Now it feels like the maxima I remember. I can't wait to put the new y pipe on now. This is why I never let mechanics work on my car but unfortunately, this was an emergency situation.
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