8 captured repliesDiscussion pagination complete · Source accounts, not a confirmed diagnosis
THIS DISCUSSION / SOURCE-DERIVED OVERVIEW
Discussion summary
YOUR RESEARCHHard to start...sometimes
Leading reported evidence
Clean throttle body well
Suggestion or failed attempt
No successful repair reported for this finding.
0
Reported fixes
0
Unsuccessful attempts
1
Discussions
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Discussions that contain suggestions
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Leading evidence: 'Clean throttle body well' (no explicit attributable resolution; this is a reported action or suggestion). Across 1 matching discussions, The most frequently discussed action is 'Clean throttle body well' (1 discussions). For that action, 0 discussions report a resolution and 0 report an unsuccessful attempt. No action has an explicit, attributable resolution report under the current rules. These are forum reports and suggestions, not a confirmed diagnosis.
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8 eligible posts · 0 unverified posts · 1 discussions match the subject in their title or opening post.
Rennlist: 1 discussions
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Generation: 20261026T172408Z · outcome-qualification-6. Deterministic extraction; no AI model inference. How we use sources
My 99 C4 118k will sometimes after sitting in the garage for 1-5 hrs be hard to start. I have to open the throttle some to get it to fire up. After starting it idles poorly for 20-30 sec.
This does not happen if parked outside (breezy?) where it might cool better? Even if I run in a store and come out it starts right up.
Any of you have similar problems?
How do you check the operation of the engine compartment cooling fan, I have never heard it run.
Thanks
My old (2003) 4S use to start a little hard every once in a while when it was not driven for a few hours. When warmed up it had no problem and when it was totally cold it had no problem. Never could figure it out.
Cleaned that and the MAF last night when I got home from work (5:30) went out at 9:00 and was hard to start.
I have not changed the plugs in 27k miles?
I wonder if you have a leaking injector? Wouldnt be too much harder to start but may create the rough idle for a little bit until the cylinder clears out.
I was thinking the fuel system is bleeding off but that wouldnt explain the rough idle.
I doubt it is the coolant temp sensor because it would do exactly the opposite of what is happening - hard to start warm, ok to start cold.
I dont know, but think fuel....I would guess the fuel bleeds off into the cylinder causing a wet plug...I would think injectors need cleaning or replaced?
just a guess
Ed
