How Do I Diagnose These Problems?

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08-07-2003, 06:32 PM

CharlieDontSurf

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Over the last couple weeks I've had some wierd, intermittent problems popping up on my '90 TII:

1. Check Engine Light comes on/off for about 10 seconds at a time - then goes away and I don't get a light for the rest of the day.

2. I started getting a "hesitation" between 2000-3000RPM. No matter how much gas I give it between 2000-3000RPM, the engine revs faster but I don't accelerate. Then around 4000RPM the car takes off, like it has a bigger turbo. It isn't a linear acceleration. I have the stock turbo FWIW. Also the engine was recently rebuilt, and I NEVER got 3000RPM hesitation on the original engine.

3. Today, the car starts, but all the gauges are dead except the Speedo. Also, I have no dash electronics (Heat or A/C), but radio works. Mouse Seatbelts don't work, but I have power windows. Stock Alarm also doesn't arm.

Can someone point me where I should start looking to root cause all these problems? I suspect they are all related.

BTW, I recently had the engine rebuilt & a new Engine Harness put in, if that helps any.

Thanks in advance!

08-07-2003, 06:51 PM

j9fd3s

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Location: California

Posts: 22,465

1. check the codes, and see where that leads you

2. see if #1 helps

3. check the fuses, i think you're gonna find the meter fuse blown

mike

08-07-2003, 11:01 PM

MazdaEnthused

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Location: Aurora, IL

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i have a simular problem but all my fuses are fine

08-08-2003, 09:57 PM

CharlieDontSurf

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Quote:

Originally Posted by j9fd3s' date='Aug 7 2003, 04:51 PM

1. check the codes, and see where that leads you

2. see if #1 helps

3. check the fuses, i think you're gonna find the meter fuse blown

mike

OK, tried checking the codes and the Check Engine Light doesn't even come on anymore - either when I turn the key to Ignition or even when I try to start it. Now what?

08-08-2003, 10:11 PM

CharlieDontSurf

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Checked fuses in the Engine Bay and in the Kick Panel and they are all OK, too. Any other ideas?

08-08-2003, 10:28 PM

RX7 13B 4 UR AZZ

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Location: Miami, Florida

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check the engine harness ground happened to me during my rebuild. got fixed after i nstalled my ground strap.

08-10-2003, 01:05 AM

CharlieDontSurf

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OK, I'll do that tomorrow. Where is the wire harness ground located?

Also, I did have the Meter Fuse blown - thought I checked all of them. Anyway, I changed the Meter Fuse and the gauges came alive. But then the same fuse blew again when I started the car while I was out & about today.

What could be causing the same fuse to blow repeatedly?

08-10-2003, 04:08 PM

Jims5543

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Join Date: Dec 2001

Location: Jensen Beach, FL / Sylva, NC

Posts: 2,934

I was thinking grounding issue. Do a search on grounding. I ran a heavy guage wire from a tranny bell housing bolt to the cars frame. With a stock setup there are a few things that need better grounding. You should find those things in a search.

Good luck!