Car not starting after exhaust upgrade
#1
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Car not starting after exhaust upgrade
I recently upgraded my cars exhaust system and removed the catalytic converters. But after doing so the car won't start. Ran a diagnostic test but nothing showed to be faulty. Does anyone know what could be the problem?
#2
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For example:
1. Is the battery reconnected (presume it is else no OBD test) so, is it even cranking?
2. Did you plug the O2 sensor(s) back in? Check condition of same after pulling them off?
3. What did you replace the cats with, test pipes? HFCs?
4. Anti-foul caps in place?
5. Automatic or 6MT?
Devil is in the details.
#5
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I've had this problem before. I installed nitrous oxide producing 250 hp and "hit the switch" right after popping the clutch while rolling downhill to get it started. Cleared it right up but then I ran into a tree.
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There's so much information missing here that no one could possibly give you an accurate diagnostic.
For example:
1. Is the battery reconnected (presume it is else no OBD test) so, is it even cranking?
2. Did you plug the O2 sensor(s) back in? Check condition of same after pulling them off?
3. What did you replace the cats with, test pipes? HFCs?
4. Anti-foul caps in place?
5. Automatic or 6MT?
Devil is in the details.
For example:
1. Is the battery reconnected (presume it is else no OBD test) so, is it even cranking?
2. Did you plug the O2 sensor(s) back in? Check condition of same after pulling them off?
3. What did you replace the cats with, test pipes? HFCs?
4. Anti-foul caps in place?
5. Automatic or 6MT?
Devil is in the details.
battery is new and connected
car cranks but does not start.
cats are replaced with test pipes
and o2 censors are back place.
I however do not know the condition of o2 censors as I did not do the work myself.
would a OBD test pick up a faulty censor? And would the car fail to start if that censors are indeed faulty?
#7
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What did you remove to do this, I know that the intake piping is commonly removed to test pipe installs . Is the MAF sensor plugged in?
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#8
New Member
The crankshaft position sensor could have been unplugged or damaged... it's right in the vicinity on the bottom of the engine when messing with cats/test pipes.
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