My 1987 Mazda RX7 Turbo has an irregular idle.


Asked by Nov 10, 2013 at 05:47 PM about the 1987 Mazda RX-7 Turbo

Question type: Maintenance & Repair

When started up cold, it revs up to around 3K for a few seconds as they all do, but when the engine runs at normal temperature...the tach bounces from 1200 - 1500 RPM's consistently. I was told maybe a vacuum leak. A friend suggested that I spray carb cleaner all over the engine compartment to determine if and where there is a vacuum leak. Any other ideas or suggestions would be very welcome.

3 Answers


Don't use carb cleaner unless you want to burn it to the ground, I use a little bottle of water and just trickle it around the manifolds, if there is a vacuum leak you will immediately find it. It sounds like you may have a sensor problem, I'd get the codes read from someone who knows how to pull the codes from a rotary and see what they come up with.

2 out of 2 people think this is helpful.

I'm glad I chose not to use the carb cleaner, definitely not looking to burn it down! When I read the side of the can and it stated "Caution Extremely Flammable", I knew there had to be a better (smarter) way.

1 out of 1 people think this is helpful.

Check the hose between the mass airflow and the turbo they tend to crack. That's what caused my issues when I first picked up my tii

Your Answer

Add photo

Related Questions


Looking for a Used RX-7 in your area?

CarGurus has 49 nationwide RX-7 listings and the tools to find you a great deal.


Search Mazda RX-7 Questions

UK Questions

Are you a UK consumer? CarGurus now has a discussion forum in the UK.

Mazda RX-7 Experts

#1 Lars Cats
Lars Cats
Reputation 340
#2 tennisshoes
Reputation 130
#3 Tom Demyan
Tom Demyan
Reputation 100
View All

Related Models For Sale

Used Toyota Supra
38 listings
Used BMW M3
77 Great Deals out of 2,091 listings starting at $4,795
Used Ford Mustang
582 Great Deals out of 41,214 listings starting at $1,699
Used Chevrolet Corvette
292 Great Deals out of 20,422 listings starting at $3,688
Used Nissan 300ZX
144 listings