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Spyder Car sputtering after warming up

Michael Palmer

Probationary Member
20
0
Oct 12, 2020
Glendale, Arizona
I've followed a few suggestions here, advice given to other, with a lot of good coming from it. I still have issues with the car sputtering while driving. It gets bad after 1-2 minutes of easy driving and high rpms don't help. I've replaced both cats but this did not help. Any suggestions?
 

Michael Palmer

Probationary Member
20
0
Oct 12, 2020
Glendale, Arizona
I did. Fuel pressure is within specs and 02 sensors replaced with catalytic converters. Possible fuel issue? Fuel pressure regulator maybe. May also be the coil pack, testing that next.
 

Michael Palmer

Probationary Member
20
0
Oct 12, 2020
Glendale, Arizona
Huh? The first O2 in the downpipe is the one that controls mixture, and should be tested, assuming the spark plugs have been replaced. The O2 after the cat only checks cat operation.
I'll have to consult the book to find out how to test the 02 sensor you sensor.
 

Michael Palmer

Probationary Member
20
0
Oct 12, 2020
Glendale, Arizona
Definately replace them. They are one of the cheapest parts on your engine (and one may have an internal hairline crack you can't see which might be your problem).
This is my 1st project car and the 1st one I've taken on mostly alone. Even with help from others, it seems like more damage was done then help.
 

waltah

Proven Member
308
128
Mar 2, 2011
fairfield, Virginia
When you replace the spark plugs, be sure the new ones are gapped correctly for your car.

If changing the plugs changes the problem (but doesn't fix it) you have an ignition problem. Keep looking in that department.
 

Michael Palmer

Probationary Member
20
0
Oct 12, 2020
Glendale, Arizona
I changed out the spark plugs, put the car on a trickle charge (wouldn't start, dead battery symptoms) and took it for a test drive. I made it 0.6 miles before it died. Maybe a bad alternator? Well, I don't need a gym membership if I just push the thing around.
 

Michael Palmer

Probationary Member
20
0
Oct 12, 2020
Glendale, Arizona
I've followed a few suggestions here, advice given to other, with a lot of good coming from it. I still have issues with the car sputtering while driving. It gets bad after 1-2 minutes of easy driving and high rpms don't help. I've replaced both cats but this did not help. Any suggestions?
Come to think of it, ever since having the interlock put in, I've had nothing but problems with electrical gremlins. Does anyone have experience with this?
 

Michael Palmer

Probationary Member
20
0
Oct 12, 2020
Glendale, Arizona
Had a DUI many years back and the guy had about as many brain cells left as he had teeth.
I'll check the battery again and alternator to see if anything is faulty.
 
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