i was driving uphill on a freeway entrance all the way through 3rd gear redline, then all of a sudden... the car begins to idle very poorly. way below 500 rpm's, and the rpm needle just bobs up and down and won't hold a steady RPM.

did i just lose compression? (busted apex seal(s))?

this is on a stock 139k GSL-SE motor btw. which i had no problems whatsoever before.

also, where can i buy a reliable/trusty compression tester?

thanks in advance

 

Did you blow your engine noob?

Luckily for you, it is probably just a vacuum leak. Grab your can of carb cleaner, and let the hunting begin!

Oh, and to be sure, did you do a ghetto compression test?

 

I thought september comes BEFORE november. Hmm, I guess we are all noobs

 

hehehe. With Noluck, it's an inside joke. From the Wesssssstside.

 

I say JUNK IT!!

 

And give me the engine...

 

no vacuum leak. it's 2 blown igniters.

web777's gonna hook it up w/ the igniters already. so i just gotta pick 'em up.

 

alright, so when do you want me to pick your motor up?

 

yes cuz cdrad's uber

 

yeah, that'll do it too. about 3 weeks ago my leading ignitors went out and I thought it was a vacuum leak. Got the ignitors replaced. A week later I developed a vacuum leak. I thought my leading ignitors had gone again. Funny. The symptoms are very very similar.

 

 

I thought I had a vacuum leak but it was a bad ignitor too. I corrected the ignition and then used some propane to check for any leaks around the manifold and carb. The idle did change a little, but I never determined where the leak was. Then I swapped the manifold and carb onto another engine and it ran fine. Weird.

The manifold is off again and I think I finally found where the vacuum leak was. It turned out to be a vacuum cap that has little cracks around it. Cheap rubber.

 

I know, I found one of those in the manifold too. The rubber cap just kinda melted I guess from the headers' heat - it was the cap of the line going to the AAV, so it's close to the headers.

 

motor now sounds like a half bridge running only on the trailing coils... lol