92 RS engine issues / AC issue

ASSISTANCE Stock Engine-Bay Components
1

Hello,
I am the original owner of a stock 92 RS. I recently developed a miss that seemed to occur 95% of the time in cold weather, less than 2000 rpm and when under a load. It feels as if someone shuts off the ignition for a split second and then turn it back on. This happens 2-3 times and then stops when over 2000 rpm. Then usually completely stops when at normal operating temperature. Today it didn’t stop when warm and continued when warm.
I replaced the cap/rotor and it seemed to help a “little”. No check engine light triggered. I sprayed cleaner through the throttle body and no difference. Maybe a TPS or MAFS?

  Question #2?
  Last year my A/C condenser started to leak.  I attempted to buy a new one from 4 different vendors and all 4 had the same issue.  The left lower pipe that is bolted from the front would not seat flush with the condenser.  I showed this to some manufacturers and they agreed it was a manufacturing defect.  The hole in the condenser is not wide enough to accept the pipe all the way to make a tight seal.  Has anyone else had this issue?  Where have you purchased a good condenser without this issue?

 THANK YOU IN ADVANCE SO VERY MUCH
2

if replacing the cap/rotor helped a bit. you may want to do a complete tune up + oil change. (when was the last time)

the injectors maybe need to be cleaned, so throw some cleaner into the tank just before you gas up next time.

map/tps can be check with multimeter…

if it still occurs clean out the IAVC. also your O2 maybe bad

where is your idle when your warming up?

have you tried junkyard or the dealership for that pipe?

3

[QUOTE=jsone;2325527]if replacing the cap/rotor helped a bit. you may want to do a complete tune up + oil change. (when was the last time)

the injectors maybe need to be cleaned, so throw some cleaner into the tank just before you gas up next time.

map/tps can be check with multimeter…

if it still occurs clean out the IAVC. also your O2 maybe bad

where is your idle when your warming up?

have you tried junkyard or the dealership for that pipe?[/QUOTE]

Does injector cleaner really work?

4

I believe the idle is normal at around 1100 + or - when cold.
I had a bad 02 before it it trigger the MIL.
I will read up on how to test the MAP and TPS.

The “pipe” is good it is the condenser that is manufactured incorrectly.

thanks for your assistance

5

check for codes. the ecm will store them, regardless of whether or not the mil is illuminated.
if no codes present, sweep the tps. if that checks fine, try disconnecting the o2 sensor. see if that makes a difference.
those are some quick checks. if they all turn up nothing, install a fuel pressure gauge in a spot that’s visible while driving. see what that pressure’s doing when the stumble occurs

6

Thank You Welfare. Did not know it will store codes without triggering MIL. I will check codes and TPS tomorrow

also- Cap and Rotor did not help

Question:
If it is the TPS I observed it is held on with “rivets”. Aftermarket TPS is available without the throttle body. Do I have to drill out these “rivets” and tap the holes?

 Thank you AGAIN
7

that would be my guess. just make sure you calibrate it correctly.
if you’re testing the tps, it would be best to at least use a graphing meter. while a lab scope would be ideal, a gm will do at least better than a multimeter. a multmeter can easily miss a dead spot in the tps range

8

did you change your O2 yet? make to reset the ECU after.