I get this code to tighten my fuel cap but it does not make my check engine light come on it just states it on the odometer screen, ive checked the gasket on the fuel cap and tightened it down really hard but still comes up??
do u think i have a leak in my fuel system somewhere? any help will help thx
05 Silverado cc LQ9, 220 220 .581/.581 114+1 LSA, Pacesetters with Ory, TBSS Intake w/ 90mm TB, Comp roller Lifters, LS7 1.80 rockers, LS1 Heads, Transgo HD2, Vette servo, 160 stat, custom 3inch exhaust, and Nelson Tuned:
5400lbs- 13.62 at 100.46mph - Dynoed at 360rwhp - 375rwtq
try replacing the cap with a new one.
ill grab a new one today from advance auto
05 Silverado cc LQ9, 220 220 .581/.581 114+1 LSA, Pacesetters with Ory, TBSS Intake w/ 90mm TB, Comp roller Lifters, LS7 1.80 rockers, LS1 Heads, Transgo HD2, Vette servo, 160 stat, custom 3inch exhaust, and Nelson Tuned:
5400lbs- 13.62 at 100.46mph - Dynoed at 360rwhp - 375rwtq
Get an OEM. Might need a smoke test.
OEM fuel cap??
05 Silverado cc LQ9, 220 220 .581/.581 114+1 LSA, Pacesetters with Ory, TBSS Intake w/ 90mm TB, Comp roller Lifters, LS7 1.80 rockers, LS1 Heads, Transgo HD2, Vette servo, 160 stat, custom 3inch exhaust, and Nelson Tuned:
5400lbs- 13.62 at 100.46mph - Dynoed at 360rwhp - 375rwtq
Yes, aftermarkets often leak.
oh ok well igot the new cap and a code poped up P0442 EVAP Leak (small) idk where this leak could be i hope its not my fuel lines cracked or cut anybody experience this code??
05 Silverado cc LQ9, 220 220 .581/.581 114+1 LSA, Pacesetters with Ory, TBSS Intake w/ 90mm TB, Comp roller Lifters, LS7 1.80 rockers, LS1 Heads, Transgo HD2, Vette servo, 160 stat, custom 3inch exhaust, and Nelson Tuned:
5400lbs- 13.62 at 100.46mph - Dynoed at 360rwhp - 375rwtq
The best way to diagnose this is with a smoke machine. It's a dealer item although there may be some aftermarket alternative.
I have just recently had the "tighten fuel cap" read out also.
The cap was fine.... No resolution on the issue yet, when I figure it out...
I'll pass it on. Good luck on the shopping ha ha ha
2005 RCSB
4.8 / T76 Front Mount, Cooled, H20 Meth, Nelson Tune
4L80E w/ Neslon Harness, 3500 stall, 4" Aluminum Shaft, Tru-Trac
Cal-Tracs
It just means you have an EVAP leak. The system tells you a few times to give you a chance to tighten the cap if it was left loose....if not, gotta get it fixed the right way.
Posting Permissions
Reply With Quote
