1990 Mazda Miata engine problems - Engine Troubleshooting


	Auto Repair Home	SEARCH POSTS	WHO'S ONLINE	LOG IN

Automotive Repair

Car Troubleshooting Topics
  Car Troubleshooting
  Engine Troubleshooting
  Engine Fault Codes
  Electrical and Wiring
  Transmission Problems

Car Repair Topics
  Car Making Noises
  Car Stereo Repair
  Heating or AC Issues
  Motorcycles and ATVs
  Tricks of the Trade
  Truck Repair Advice

Site Options:
  Login
  Sign up here!

Latest Forum Post

Strut spring orientation and strut mount tension nut

2017 Nissan rogue awd 2.5 L Put in Monro...

Transmission stuck in part, I have tried everything

So I'm working on my elderly fathers 201...

2017 dodge journey LED headlights on/off randomly

Year of vehicle 2017 Make of vehicle dod...

Kia Soul starter replacement issues!

Okay so my car is a 2010 Kia soul 2.0 en...

Please Help - Knock sound & engine fail

Hi all, Hoping to get some insight and ...

multiple warning lights

2013 GMC Terrain 130,000 miles 4 cylinde...

03 alero no low speed blower

Good day everyone, I have a 2003 Olds a...

04 Chevy 2500hd tail light issues

Help!!! I have changed my combo switch...

1999 Grand Caravan Sport not starting.

Hi. I'm new here. I hope someone can hel...

Brake Seals Bulging

2021 Toyota Corolla LE 1.8l 65,000 mile...

1990 Mazda Miata engine problems

Sign up here!

Search for (search options)

Auto Repair Home>> Automotive Repair>> Engine Troubleshooting

Harmitt
New User

Oct 6, 2012, 8:23 PM

Post #1 of 5 (7866 views)

1990 Mazda Miata engine problems	Sign In

I have a 1990 Mazda Miata with a 1.6L engine with 209,000 miles on it. It sputters and has no power during acceleration. When it get to about 3000 rpm it goes pretty good. I feels like it is missing. I replaced the spark plugs, wires, and air cleaner. It made no difference. I removed the cat converter thinking it might be plugged and started it up with it off. It still ran the same. A guy at the parts store said he thought it might be the coil. I checked to see if there were any fault codes, it blinked twice. The number 2 fault code is "no NE signal". I researched that and it is a signal that comes from the cam position sensor. I unplugged the cam sensor and the car wont start with it unplugged. Can anyone help me know how to test a coil and cam position sensor. They are quite pricy and I dont want to replace them if it is not going to fix the problem. I would appreciate any help!

91 Isuzu 4ex1
Novice

Oct 6, 2012, 9:06 PM

Post #2 of 5 (7843 views)

Re: 1990 Mazda Miata engine problems	Sign In

Have you done a compression test?

At that mileage it might be time for new rings.

Just a thought.

Discretesignals
Ultimate Carjunky / Moderator
Discretesignals profile image

Oct 7, 2012, 7:42 AM

Post #3 of 5 (7819 views)

Re: 1990 Mazda Miata engine problems	Sign In

If you unplug the crank angle sensor, the engine definitely won't run or will stall. The crank angle sensor has two sensors built in. One is the G sensor that detects TDC and the other is the Ne that detects crank angle at 180 degrees.

You need to have someone test the Ne signal coming from the crank angle sensor using a oscilloscope and make sure it is reaching the ECU.

Since we volunteer our time and knowledge, we ask for you to please follow up when a problem is resolved.

Harmitt
New User

Oct 7, 2012, 10:25 AM

Post #4 of 5 (7810 views)

Re: 1990 Mazda Miata engine problems	Sign In

Do most repair shops have an oscilloscope, or do I need to take it to a dealer?

Discretesignals
Ultimate Carjunky / Moderator
Discretesignals profile image

Oct 7, 2012, 10:49 AM

Post #5 of 5 (7803 views)

Re: 1990 Mazda Miata engine problems	Sign In

You might be able to find out by calling some of the shops in your area.

Since we volunteer our time and knowledge, we ask for you to please follow up when a problem is resolved.

Search for (options) Privacy Sitemap