dave1200

Hi all. I have a strange question.
On the 88 32 Valve engine. It had a slight idle surge after it got to temp, not bad, but hunting a little. I put new plugs in, and it started surging very fast up down up down. Sounded like someone was in the car reving it. I triple checked all the vaccume connections to make sure I didnt knock something off.

Thats the only change I made:
The plugs I removed were all carboned up.

Why would it do this just because of a plug change? It didnt do it while it was in gear. only Park or Neutral. The car was ALOT morte responsive with the new plugs

Thanks for any insight to this strange problem.

Dave

Gretch

You have either a vacuum leak or your idle stabilizer is gummed up. Prolly the idle stabilizer. Do a search on it and give it the WD40 treatment......

whall

Dave,

I had the exact same thing happen to me. I asked here and was told to check vacuum. Bought a vacuum tester, found the leak way under the back, replaced the hoses and fixed the problem.

dave1200

where exactly is teh idel stabilizer on these cars? WHat does it look like? What general location would it be?

marton

take a carefull look at any vacuum lines near theactual plugs, maybe one got knocked off during the plug change?

Gretch

here is a picture. it is under the intake manifold. DO A SEARCH.

dave1200

Thanks...got it!!!

dave1200

I put the old plugs back in..no more surge. The new ones were NGK's ????
Very strange.....

Gretch

I will say that is strange.................Try AC platinum plugs..................I have had great results with them. Bosch are also quite good, and actually cheaper. This is because the platinum center piece is considerably smaller......

Mark

Recent thread on spark plug selection - Others (like the AC's mentioned by Gretch) are ok, but general consensus - Bosch Super's (STAY AWAY FROM THE MULTI ELECTRODES!).

It could be that the NGK's are the incorrect heat range....AND - there is likely an underlying reason that the old ones were "carboned up"