19 captured repliesDiscussion pagination complete · Source accounts, not a confirmed diagnosis
THIS DISCUSSION / SOURCE-DERIVED OVERVIEW
Discussion summary
YOUR RESEARCHFuel Pump relay location?
Leading reported evidence
Check fuse and relay
Performed · outcome unconfirmed
No successful repair reported for this finding.
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1
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Leading evidence: 'Check fuse and relay' (no explicit attributable resolution; this is a reported action or suggestion). Across 1 matching discussions, The most frequently discussed action is 'Check fuse and relay' (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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Suggestion · Original poster
Have a tow truck scheduled but will check tach before he takes it.
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19 eligible posts · 0 unverified posts · 1 discussions match the subject in their title or opening post.
Rennlist: 1 discussions
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Have 2000 C4 - drove to work no problem. parked. Came out after work (no rain) - engine turned over but won't fire. First time for this one. Checked fuses (C1-C4) all good. Thinking from reading threads - might have a bad Fuel Pump DME relay. Does that make sense? Drove in no problem, but after sitting won't start? Where is the Fuel Pump DME relay? Anyone have any pictures (I'm a visual guy). If I find the location - I can try to jumper just to see if that is it. (then purchase a new one).
Thoughts? location drawings?
Thanks
gmorris552
thanks kromdom - I'm guessing from description it is up under steering wheel on firewall somewhere. will take a look tomorrow. And yes - I too hope its not fuel pump muphyslaw1978.
gmorris552
[Image-only post; no author-written text. Original image references:]
https://cimg1.ibsrv.net/gimg/rennlist.com-vbulletin/701x542/relay_support_1_bce9041d325ba851346387846fb93ee3e12922d5.jpg
https://cimg3.ibsrv.net/gimg/rennlist.com-vbulletin/1298x885/relay_support_1_relay_diagram_100df5dacbeeb97e659d7af6e37c23bf3e82bf07.jpg
Thanks DBJoe. One more question. I've read that you can wire together a couple of the sockets to 'test' (i.e. bypass) the relay to see if that is the culprit. Think I pulled the correct relay (see picture) Any idea of which of the 4 slots i'm supposed to jumper to bypass on the board?
Just have to mention - a bad ignition switch (the electrical part) has been known to cause all sort of electrical gremlins. For a crank but no start condition, the usual culprits are ignition switch, fuel pump, or the CPS (crank position sensor). The CPS goes without warning. Does your tach needle bounce when you crank it over? If not, bad CPS. Let us know how it goes.
Will check the tach bounce. Tried the jumper of relay - no joy but worth a long-shot. Have a tow truck scheduled but will check tach before he takes it. Will update thread when I know more. Joy of ownership of an awesome car.
The relay (pin 30) is hot at all times (even with no key in the ignition) so if you jumped it correctly and don't hear your fuel pump, it's very likely your fuel pump is dead.
