All Questions
10 questions
-1
votes
2
answers
590
views
Why does the California smog check involve an inspection of the ignition timing?
I purchased a 30-year-old truck, which seems to run well in spite of its age. But when I take it to get a smog check, the engineer clips a timing light to the first spark plug and tells me that the ...
- 121
1
vote
1
answer
48
views
Does my 1995 Cadillac incorporate ECM
I own a 1995 Cadillac. Does it incorporate a module that adjusts ignition timing for octane?--At what interval?
- 11
4
votes
1
answer
517
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 ...
- 41
2
votes
2
answers
948
views
Motorcycle: fuel and spark but no ignition?
I inherited a '79 Yamaha XS400 (2 cylinder, 4 stroke, air cooled, SOHC, duel carburetors).
The timing chain had broken so I replaced it, setting the timing at the same time.
I cannot start it. The ...
- 3,762
5
votes
2
answers
12k
views
Diesel engine timing?
A petrol engine can fire the spark plugs slightly earlier or later to account for factors like revolution speed and engine temperature.
However a diesel only fires when the mixture is compressed. ...
- 3,063
3
votes
1
answer
69
views
Rover Mini Mayfair Auto 1990/H
When cranking, the engine turns and there is a spark....not strong. I can't find the timing mark through the circulled(rubber) hole, but the arrow shows on the cover.
How can I freely turn (by hand) ...
- 31
5
votes
4
answers
6k
views
97 Honda Accord won't start after head gasket replacement
I recently replaced the head gasket on my Honda Accord. The cylinder head was tested at a machine shop and they also replaced the valve seals.
I didn't do any work to the cylinders, except use ...
- 310
3
votes
1
answer
712
views
How is Dodge Spark Advance Controlled by the PCM if there is a Distributor?
The Chilton manual for the late 90s and early 2000s Durango and RAM says that PCM controls ignition timing and spark advance. I don't understand this, because these motors are equipped with a ...
- 133
7
votes
3
answers
2k
views
Single-cylinder engine - no camshaft position sensor?
I'm doing some research on the Honda CRF450. This is a single-cylinder engine. I'm interested in the fuel-injected models (not the older carbureted versions).
As far as I can tell, this engine doesn'...
- 173
9
votes
1
answer
15k
views
Acceptable amount of slack in a timing chain with high mileage?
1995 Chevy S-10 Blazer - 4.3 L Vortec V6 (vin W with PCM) - 230,000 miles original owner.
FWIW, this model car/engine does not have timing chain inspection and/or changing as part of the routine ...
- 476