Could my intake manifold have a crack in it to make my 1997 Cadillac deville idle to high

Asked by Nov 24, 2015 at 06:37 PM about the 1997 Cadillac DeVille Base Sedan

Question type: Maintenance & Repair

6 Answers

52,125

That is a possibility yes. Check for loose or cracked vacuum hoses too. Use some spray carburetor cleaner and spray it on suspect areas. If you notice an immediate change in engine speed then you have found a leak.

i try all that at first, but the engine never changed speed, i changed the tps and nothing happen, after a few hours it will mysteriously idle back down for a few hours then it will go back up to 2000 to 2800 rpm

100

Checj to see that your temp sensor is working correctly . low temp will cause high idle if not at operating temp. Also check coolant.

my coolant sensor is brand new, i just put a motor in this car, coolant level is full, it still idles very high at 200 degrees, then occassionaly it will just ease back down, or you can cut the engine off and restart it will idle at about 1500 for a while then ease back up

4,425

Sounds more like a sensor problem than a leaking manifold. The manifold problem typically would not cause the engine to "cycle" the RPM's up and down.

i have replaced the tps the coolant temp sensor what else do you recommend, the check engine light is not on

Your Answer

Add photo

Related Questions

  • High RPM problems with my Cadillac 4 answers

    My cadillac deville is having engine problems. It was having trouble starting (I would have to hold down the gas pedal and keep the engine idling so it would stay on and not stall out). I took it to ...

    2003 Cadillac DeVille

    -

    Maintenance & Repair

  • High ideling 4 answers

    When I start up my Cadillac deville right when it turns over, it jumps to the high revs until it backfires and dies out. I replaced the mass air flow sensor and reset the onboard computer but it s...

    1997 Cadillac DeVille

    -

    Maintenance & Repair

  • My 1997 Cadillac deville keeps idling too high 1 answer

    1997 Cadillac DeVille Base Sedan

    -

    Maintenance & Repair

  • Why is my 1999 cadillac deville idled so hi 3 answers

    1999 Cadillac DeVille Concours Sedan

    -

    Maintenance & Repair

DeVille

Looking for a Used DeVille in your area?

CarGurus has 1,587 nationwide DeVille listings starting at $1,995.

ZIP:

Search Cadillac DeVille Questions

Cadillac DeVille Experts

#1 kikero
kikero
Reputation 2,060
#2 Js08016
Js08016
Reputation 1,710
#3 Cynthiasmith
Cynthiasmith
Reputation 1,530
View All

Related Models For Sale

Used Cadillac Eldorado
379 listings starting at $995
Used Lincoln Town Car
31 Great Deals out of 1,818 listings starting at $1,650
Used Chevrolet Impala
588 Great Deals out of 29,008 listings starting at $1,300
Used Mercedes-Benz S-Class
147 Great Deals out of 6,393 listings starting at $2,300
Used BMW 7 Series
180 Great Deals out of 6,179 listings starting at $3,500
Used Chevrolet Camaro
137 Great Deals out of 35,611 listings starting at $1,995

Used Cars For Sale

2005 Cadillac DeVille For Sale
3 Great Deals out of 217 listings starting at $3,995
2004 Cadillac DeVille For Sale
4 Great Deals out of 213 listings starting at $2,295
2003 Cadillac DeVille For Sale
209 listings starting at $3,850