Here's my story: 1993 36k M. I had extractors and new exhaust fitted 2 months ago & immediately got code 26 & 28. 26=EGR...I could understand. I drove the car for 6 weeks with these codes & the day before I am due back at the exhaust shop, the car gives a flutter @ 60mph on a highway cruise. Returning home that night, the car starts backfiring, missing and stalling at the lights. It restarts each time, but it continues to play up. Code 36 has now been triggered.
Leaving it for 90 minutes, the car drove home 40m no dramas.
Back at the exhaust shop, we can see the leads have been scorched by the headers, so we replace those, and the mechanic finds a connection locvated under the ASR module that wasn't re connected. I drive out of there with no codes & a smile on my dial......30 mins later on the highway home, the car sputters, goes into bronco riding mode and dies when I slow down. It now does this everytime after about 30 mins driving. I have taken it to the shop (chev isn't sold down under), and now code 28 reappears. He has replaced an opti on a previous car & doesn't want to touch it until he can clear up code 28.
Would code 28 cause this ? or have any affect on the engine. Is it likely to be the opti that causes the problem to appear after 30 min enginne time? The engine hasn't been wet, the waterpump doesn't appear to be leaking & the car doesn't overheat
:confused: :(