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Old 06-04-2019, 09:12 AM   #1
Burnt Sierra Madre
Join Date: Jan 2009
Location: Fort Joe Smith, Klendathu
Default Kjet stranding, starts and immediately dies

1981 240 kjet ci
Starts, dies in 2 seconds
Ran great, now I'm stranded.
Feels like start injector gets her going, then dies when.key released,and main system doesn't put fuelout
Jumpered pumps, no change.

Was symptom when I acquired car, found big hose toairvalve off under manifold, ran ok after fixing that, then I redid all sorts of stuff and she ran great until now.all pressures were good, overall shape is great, new vac line s, cleaneddistro and CPR, new harness, all was clean and orderly.
No vac leaks right now, what is going on?
Originally Posted by lummert View Post
Dammit, Lummert.
Originally Posted by Jesse8931 View Post
Well keep us updated on how your dumbass plan goes.
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Old 06-04-2019, 09:36 AM   #2
Board Member
Join Date: Jan 2003
Location: Austin, TX

Sounds like you're losing spark. Have you tried bypassing the ballast resistor?
Volvo side: 84 242Ti
VAG side: 97 Jett TDI, 02 B5.5 Variant, 09 JSW TDI (Crushed!)
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Old 06-04-2019, 09:42 AM   #3
Burnt Sierra Madre
Join Date: Jan 2009
Location: Fort Joe Smith, Klendathu

was fuel pump relay, part that activates ignition, I jumpered 12V+ to the brown wire at coil, she stayed running and got home.

Weird thing is, exact symptoms when I bought car, thought I fixed it by vacuum leak fix, btu it spontaneously fixed itself and failed months later again.

Last edited by apachechef; 06-04-2019 at 12:13 PM..
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Old 06-04-2019, 09:18 PM   #4
Have you seen me?
2turbotoys's Avatar
Join Date: Nov 2007
Location: Reading pa

I got dam tired of replacing the K Jet fuel pump relay so I did this: https://www.240turbo.com/fuelpumprelay.html
I had a 30 A Bosch 5 pin relay sitting around so you shrink wrap the center pin and follow the diagram, the factory relay runs a lot cooler now. The downside is the noise from the extra relay is noticable, but I will swap to a modern relay to stop that minor issue.

Part of the problem was the relay plug was melted from the excessive heat, causing a bad connection/arcing on the #30 pin, burned up 3 relays in a few months till I figured out the relay pug needed to be fixed. Got that stuff from Dave Barton also, it's pretty cheap.
Feedback thread https://forums.tbforums.com/showthread.php?t=144924

1978 242, 5.3 L33
1979 242, MS, R brakes
2006 V50 T5 AWD @ 17 PSI
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