Hesitates when engine is cold
#1
02-11-2015, 02:34 PM
Hesitates when engine is cold
My 99 blazer 130k miles hesitates when its first started up. I changed the fuel pump and injectors all with delco replacements and did a complete tune up delco cap rotor plugs and wires. It only does this if I don't let it warm up and I have no check engine light either.
#2
02-11-2015, 08:41 PM
After the vehicle sets for 10 to 12 hours, and before you start the engine, use a scan tool to compare ECT, (engine coolant temperature), IAT, (Inlet Air Temperature) and ambient temperature. They must all be within a couple of degrees of each other.
Post your results.
Next step is check fuel pressure and leakdown. This link explains: https://blazerforum.com/forum/2nd-ge...eakdown-88305/
Post your results.
Post your results.
Next step is check fuel pressure and leakdown. This link explains: https://blazerforum.com/forum/2nd-ge...eakdown-88305/
Post your results.
Thread
Thread Starter
Forum
Replies
Last Post
mickey_bigdaddy
Engine & Transmission
1
05-27-2015 02:01 PM
thesnowgod
2nd Generation S-series (1995-2005) Tech
7
12-05-2007 02:41 PM