Help! cold start problem

[jake1boy]

can someone advise possible cause of this issue:

I need to crank car 15 times on COLD start, once its warm , car will start 1st try all day. Car has no codes and runs excellent. please help. One mechanic suggested bad injectors?

 

[vetteoz]

can someone advise possible cause of this issue:
I need to crank car 15 times on COLD start, once its warm , car will start 1st try all day.

Most likely the cold start injector is not working correctly
The cold start switch ( brass unit with hex head on LHS in pic ) only has power when engine is cranked over
and if engine is cold enough , the switch sends power to the cold start injector located in the drv side of intake
operating it to spray extra fuel ( like a choke on a carb car ).
Check for 12V at switch when cranking.( any temp )
Check for 12V out of switch and at CSI ( Cold start injector ) when cold cranking.
If you have power there then most likely CSI itself is faulty

 

[WRECKER88]

I just had the same problem will my 1989 coupe. I had a code 14 (high coolant temp) that would com and go. So i got a FSM and EASE Pro PC Scan Tool from Ebay and found that the ECM thought the coolant was 252 degrees when the engine was cold. With help from the FSM i was able to check the coolant temp sensor and the wiring all checked good. Next i got a reman A/C Delco ECM from the local GM dealer and now my car starts cold.

To work on these cars you will need

1 FSM Factory Service Manual
2 Volt Ohm Meter
3 Scan tool ( i like a PC scan tool )
4 Fuel Pressure gauge

OBD1 OBDI GM Pro Scan Tool Diagnostic | eBay

 

[vetteoz]

I just had the same problem will my 1989 coupe.

89+ TPI uses a different setup were the injectors spray extra fuel on cold start.
Does not have the standalone CSI that the earlier engines do