stumbling idle and my codes...
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Tuned
Joined: Jun 2003
Posts: 489
Likes: 1
stumbling idle and my codes...
I got a bit of missing in my idle/roughness and am having problems nailing it down--engine runs fine while driving...very smooth. I have checked my EGR valve and the EVP sensor and they seem to work ok (restrictor plate made no difference and when I pull the vacuum hose off the evp, there isn't any vacuum at idle---which I think is correct?). I've replaced the cap/rotor, wire, plugs, coil, MAP sensor already. I pulled the upper intake off and cleaned it up and replaced the gasket...so it isn't leaking (I've checked). Here are the codes that I am still getting...
327 EGR (EVP/PFE/DPFE) Circuit Below Minimum Voltage
334 EGR (EVP) Closed Valve Voltage Higher Than Expected
542 Fuel Pump Secondary Circuit Failure
311 Secondary Air Injection (AIR) System Inoperative During KOER Bank # 1 With Dual HO2S
I don't even know where to start with the 542, and the 311 has me stumped because I don't have dual H20 sensors in this truck??
Thanks.
327 EGR (EVP/PFE/DPFE) Circuit Below Minimum Voltage
334 EGR (EVP) Closed Valve Voltage Higher Than Expected
542 Fuel Pump Secondary Circuit Failure
311 Secondary Air Injection (AIR) System Inoperative During KOER Bank # 1 With Dual HO2S
I don't even know where to start with the 542, and the 311 has me stumped because I don't have dual H20 sensors in this truck??
Thanks.
Last edited by dbuck50; Oct 6, 2003 at 02:21 PM.
Senior User
Joined: Jul 2003
Posts: 299
Likes: 2
From: central valley California
try clearing your codes then running the engine for a day then reread your codes.
i and having the same problem and it turns out that it is my timing chain. I dont have any codes though. 95 f150 super cab 302. 4r70w trans..
i and having the same problem and it turns out that it is my timing chain. I dont have any codes though. 95 f150 super cab 302. 4r70w trans..
