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Questions tagged [mazda-626]

Family car manufactured by Mazda from 1970 - 2002.

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4
votes
1answer
278 views

98 Mazda 626 GF 2L ATX zero ignition timing at idle?

My 1998 Mazda 626 GF 2L ATX has zero ignition timing at idle when fully warmed up causing a rough idle condition. I've replaced the faulty O2 sensor with no effect on the retarded timing and replaced ...
3
votes
3answers
545 views

Mazda 626 99 overheating when on and not moving

In the last two days I've seen my heat meter goes above the normal, but only when car is stopped. Long red light, two minutes in car with engine on it starts overheating. But when I go, even in slow ...
8
votes
1answer
1k views

Rough idle only under load

I'm going to describe the symptoms with a very short history, some preliminary theories ( based on past work I've done on this car ), the data I've gathered and what, if any, conclusions I might draw ...
7
votes
1answer
316 views

Excessive Coolant Expansion: Part 3

Part 3 in the ongoing saga of my 98 Mazda 626 2L ATX's cooling system. Here are links to Part 1 and Part 2. A quick recap. My coolant tends to overflow my expansion reservoir. I've flushed the ...
4
votes
2answers
5k views

Should the EGR be activated at idle?

My 98 Mazda 626 2L ATX has a fully electronic EGR valve controlled by the ECU. I've been trying to figure out a rough idle problem for a long time, which gets worse when the engine is under load, ...
3
votes
2answers
78 views

Knock on 2000 Mazda 626 after replacing the alternator

Why would my 2000 Mazda 626 start knocking after replacing the alternator? It did not knock with the old alternator.
3
votes
1answer
188 views

Why are there separate Fuel Pressure Regulator and Maximum Fuel Pressure Tests?

There are a few different active fuel pressure tests listed in the 97 Mazda 626 GF Work Shop Manual ( European ). The first two are an idle pressure test ( 30 - 36 psi ) and a fuel pressure regulator ...
4
votes
2answers
800 views

Why are my injectors different colors when they all have the same flow rate?

As can clearly be seen in the picture, the injectors on my 98 Mazda 626 2L GF are different colors: This is even mentioned in the official Workshop Service Manual: However, both according to the ...
4
votes
1answer
431 views

What does a good injector spray pattern look like for a four hole injector?

I have four hole injectors like this on my 98 Mazda 626 2L GF: What does the proper spray pattern for this type of injector look like?
5
votes
1answer
242 views

Do I have a fuel pressure or injector problem, or am I just chasing ghosts?

I just did a fuel volume test on my 98 Mazda 626 2L GF. According Tim Giles book Automotive Service: Each injector is energized for 15 seconds... Variations of more than 5 ml calls for replacement ...
3
votes
1answer
822 views

Do fuel pressure regulators allow some fuel to flow even when not turned on?

I'm completely rewriting this question since I really wasn't clear before. When discussing a fuel system with a return line and a vacuum operated fuel pressure regulator such as this: Where it says "...
4
votes
1answer
345 views

Can't get a fuel pressure reading

I wanted to test out my fuel system components on my 98 Mazda 626 GF 2L, so I hooked up my fuel pressure gauge between the fuel filter and the fuel rail. I've used this gauge on this car before, and ...
2
votes
1answer
94 views

How Long to Power the Injectors for a Fuel Pump Volume Test?

I want to do a fuel pump volume test on my 98 Mazda 62 2L GF, but the WSM doesn't say how long to energize the injectors: I'll probably activate the injector by back probing the injector ground wire ...
6
votes
1answer
8k views

Why would a brand new water pump make noise?

Many of you followed the saga of the noise coming from my timing belt area after I changed the belt and the water pump. The noise eventually went away on it's own, and I think we determined with a ...
12
votes
3answers
4k views

Strange noise from timing belt area

I just changed the timing belt and water pump on my 98 Mazda 626. After I got everything reassembled I started up the engine. I had been running the engine for a few minutes, revved it up to around ...
3
votes
0answers
243 views

Why is there white smoke coming from the exhaust where the tailpipe and muffler meet and it looses power it is a 2000 Mazda626 234000+ miles [closed]

White smoke from exhaust where tailpipe and muffler meet and it looses power it is a 2000 Mazda 626 with 234000+ miles
5
votes
1answer
416 views

Can I use a FN4A-EL Turbine Speed Sensor on a GF4A-EL?

I have a GF4A-EL on my 98 Mazda 626 GF 2L and strongly suspect the TSS is defective. I can't find any sensors for my tranny, but I have read that the FN4A-EL is just an improved version of the GF4A-...
4
votes
0answers
64 views

Will it harm the transmission to drive with a defective Turbine Speed Sensor?

I recently got a 0715 DTC ( 98 Mazda 626 GF 2L, GF4A-EL transmission ) which is related to the turbine speed sensor. Some of the symptoms according to the ATSG transmission manual are harsh and ...
6
votes
2answers
2k views

Cranks, but No Spark and Can't Connect to the ECU

It just never ends. 98 Mazda 626 GF 2L. It cranks great, but there's no spark at any of the plugs and I can't connect to the ECU. Coil pack is new, I've driven it maybe five times since I replaced ...
4
votes
1answer
1k views

The Testing Procedure for the Mazda 626 Alternator in the WSM is Unclear

I have some questions regarding the alternator testing procedure outlined in the 98 US work shop manual ( this is related to my battery warning light question ), my car has the FS engine: When it ...
5
votes
1answer
502 views

Mazda 626 1995 automatic won't shift gears

I have a 1995 Mazda 626, 2.0L, automatic transmission. The transmission won't shift. It stays in 3rd gear and won't go into any other gear. The car does drive, but won't change gear out of 3rd. The ...
4
votes
0answers
84 views

1998 Mazda 626 LX with CEL and rough idle

I have a '98 Mazda 626 LX. About a month ago it suddenly started shaking really badly, so I took it to Midas for them to check the engine. They told me it needed a fuel flush, throttle body cleaning, ...
11
votes
2answers
13k views

My Ignition Timing is Retarded, no seriously, it's really screwed up

I logged some test data to try and help me figure out why my 98 Mazda 626 GF 2L ATX has a rough idle and is suffering from hesitation. (Speed k/h),(TPS_v),(MAF g/sec),(RPM),(SparkAdvance),(EngineLoad)...
3
votes
2answers
7k views

Interpreting Cylinder Compression Readings

So I've been having some engine trouble with my 98 Mazda 626 GF 2L, specifically a low, rough idle and lack of power on acceleration. One of the things the WSM says to check for both these problems ...
6
votes
1answer
26k views

Excessive Vibrations in Drive when holding down the brakes

I'm working on a 98 Mazda 626 GF 2L with an automatic transmission. While I'm used to driving manuals, I would say that the amount of vibration when sitting stopped in drive with the brake on seems ...
3
votes
1answer
38 views

2000 mazda 626 v6

My Mazda shuts off when I apply the brakes. Can anyone help me with this problem. It idles just fine but when I apply the brake to put it in reverse it bogs down and completely shuts off. What could ...
2
votes
2answers
2k views

Mazda 626 with Unknown Coolant Leak

I'm looking at a 98 Mazda 626 2 liter with an unknown coolant leak from the area in the back of the engine. Seller says a mechanic that quickly looked it over said he thinks it's either the head or ...
3
votes
0answers
398 views

Changing Freeze Plugs on a Mazda 626

On a 98 Mazda 626 4 cylinder 2L engine where are the freeze plugs and how hard is it to replace them?