Anyone ever had updated spider give em issues? Startin to wonder if that's my problem. Not throwing any codes but 2nd motor is now developin the same slight shake at ~1700 rpm. When we pulled old motor the headers were both clean at #5&6 but was getting spark so now I'm leaning towards fuel issues. Pretty sure before old motor crapped out I was getting lean condition on both banks. Is there anyway to test the updated spider or maybe a way to check it with a scanner?
Mpfi spider problems?
- Thread starter Joe Dirte
- Start date
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Devon 11
OBS Enthusiast
Have you tried using a Noid light
Devon 11
OBS Enthusiast
It tests the wiring to make sure it’s getting signals from computer. You can loan them from autozone and check in parking lot with a couple minutea
Devon 11
OBS Enthusiast
Just plugs into the large connector that plugs into spider than you crank it over to see if it lights up. Easier with someone to watch while one turns it over
Can a proper scan tool perform a cylinder-balance test?
If you hold ~1700 rpm, where it runs rough, what does the scan tool show for cylinder-by-cylinder misfire counts?
If you hold ~1700 rpm, where it runs rough, what does the scan tool show for cylinder-by-cylinder misfire counts?
I was hopin it would but mine won't. Got the torq app unless there's a pid to program in. I did buy an infrared thermometer to check header temps. As I did have spark at both #5&6 so fuel was my next guess. Too bad it's 17° today and it doesn't fit in garage easily. I did check rockauto n individual mpfi injectors ain't too expensive if I remember correctly.
I'll check into it when I head to class. Last time I did it on my 96 used a test light on the OEM spider to find out which one wasn't grounding since I think the poppets worked by grounding out? Like I said been few years n can't remember exactly.
Been 2 yrs fightin this problem off n on between back issues n nonstop long work hours. Really wantin my truck back haha. Plus if it's something simple I'll be at the point I can start doin my ridiculous add ons (train horns, air bags, lift etc.) Just don't wanna throw bunch of fun stuff on a lawn ornament.
Devon 11
OBS Enthusiast
The noid light won’t test the spider though it will test whether or not it’s receiving signal. Another thing you can do is unplug a injector at a time from the intake manifold and turn it over. Point the tip at a rag or something and make sure there’s no spark to any of the cylinders before you do this otherwise could get dangerous.
Danger's my middle name... Or maybe its Stupid? We'll find out if need be haha
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