96 ssei dies after 5 psi boost - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


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Old 06-30-2014, 10:23 AM   #1
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Default 96 ssei dies after 5 psi boost

I can drive my car along fine untell the gauge reads around 5 psi then she starts surging and shuts off sometimes. any ideas? just started happening out of the blue.. I am checking the fuel pressure sometime today.
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Old 06-30-2014, 11:48 AM   #2
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Yup, I 2nd the fuel pressure check.
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Old 06-30-2014, 09:43 PM   #3
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fuel presure is 41 at idle, when reving it hits 50, remove vac line jumps to 43, replaced icm. still surges. I can start the car drive 5 km and shes workin fine, drive it to the floor,get 7.5psi boost and pulls like a fright train. then I could drive it to the floor again and she hits around 3500-4000 rpm round 5.5 pounds of boost and surges "only when under hard accel", drive normally and the problem is non existent..vac lines are good, boost bypass working, evap working....the only think i know of is the oil pressure sensor is broke but from my research it should not cause anything like this only that the gauge is peged on max due to loss of contact internally
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Old 06-30-2014, 09:56 PM   #4
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no trouble codes and the datastream from the ecu seams pretty normal, what should these engines be running at for timing advance?
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Old 06-30-2014, 10:50 PM   #5
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How long since last tune up?
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Old 06-30-2014, 10:52 PM   #6
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plugs and wires got about 4000km on them, gonna change the fuel filter tomorrow also
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Old 07-01-2014, 07:36 PM   #7
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Well just put 100k on the car and same thing replaced oil sensor and nothing changed. 10km from da house she started workin like crap and lost the oil out of the supercharger.. Supercharger still feals good but do you think this my surging problem? I got a m90 gen5 I was going to swap on but I was going to hold off but I guess the time is come
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Old 07-02-2014, 01:07 PM   #8
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Well just put 100k on the car and same thing replaced oil sensor and nothing changed. 10km from da house she started workin like crap and lost the oil out of the supercharger.. Supercharger still feals good but do you think this my surging problem? I got a m90 gen5 I was going to swap on but I was going to hold off but I guess the time is come

I have never heard of a 3.8 */c losing oil from the supercharger. Can you tell where it leaked?
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Old 07-02-2014, 03:39 PM   #9
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poped the bonnet and watched it all flow out the snout of the supercharger....i left the car for a hour and when i started her back up she worked perfect all the way home for 12 km, but now i got to replace the seal and oil...this problem got me stumped...random stalling, and dieing out under load...not fuel related pump and filter are good
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