ZR-1 Net Registry Forums - View Single Post - After driving car for 7-10 minuts...

A26B · 09-10-2010

The secondary pump comes on when the secondaries are activated for full power (all 16 injectors).

No need for the secondary pump to operate during normal driving.

You need to
1. check for stored codes
2. disconnect the battery for a couple of minutes, then re-connect to clear stored codes
3. drive again to re-create problem
4. check & record stored codes
5. bring the info here for review

You probably have a secondary opening problem

09-10-2010	#12
A26B Join Date: Dec 2003 Location: Arcadia, OK Posts: 3,401	Re: After driving car for 7-10 minuts... The secondary pump comes on when the secondaries are activated for full power (all 16 injectors). No need for the secondary pump to operate during normal driving. You need to 1. check for stored codes 2. disconnect the battery for a couple of minutes, then re-connect to clear stored codes 3. drive again to re-create problem 4. check & record stored codes 5. bring the info here for review You probably have a secondary opening problem __________________ Jerry Downey JERRYS LT5 GASKETS & PARTS http://www.jerrysgaskets.com 1994 *ZR-1*, Black/Black, Lingenfelter Aerobody, 416cu in, 3.91 gears, coil-over susp, Brembo brakes, etc. 2016 Black-Red, 3LT-Z51 Auto 8-speed.