Calypsorot '90 325i Coupe
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WHAT ABOUT CARS AND COFFEE!?!?!?!?
I've been going every week Patrick! Sadly I'll miss all the lake mills though.
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Pat and Jameson stopped by while Matt and I worked on the car this afternoon, I'm somewhere in that pic. Got the old harness out and swapped on a different one but still no priming even of the fuel pump. So now the fun begins, hopefully I can kill two birds with one stone when I figured this out to help with the e28's basically the same issues.
bentley procedure isn't helpful so I'm gonna run through this tomorrow. http://www.e30zone.net/e30zonewiki/index.php/Engines_Troubleshoot
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Sorry I didn't make it over Sunday, I was being lazy. Not sure if it's the same with the M20, but the M42 doesn't always prime. Some people say it does, others say it doesn't. You can jumper the relay to verify that the pump is working (key may need to be on). If it runs when jumpered then you should be good to go. Let me know if you need any help or an extra pair of hands.
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Alright guys I'm stumped. Engine cranks with fuel and spark but still doesn't fire. Brand new VDO fuel pump, new temp sensors, all cyls have spark, injectors have power, fuel and main relay have power, jumping main relay turns on icv, swapped 3 dme's in with no luck.
I have something wired wrong though as I can crank the car from the ignition switch but I can't from the diagnostic port.
Although I didn't modify/touch these I did notice some wire hacking under the column. The black/yellow wire was spliced and reconnected twice and the green wire was spliced with a extra wire joined in but not connected to anything. Is this the green wire that goes to the coil?
Also the two prong connector off the engine harness by the dme is for the OBC correct? This car doesn't have a 13 button and I can't find any wire that would plug into this.
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Issue I ran into with a friends e30 was the green wire and a bad immobilizer connection. Either make sure things are plugged in or bypassed.
Same symptoms: fuel, spark, good Dme, and no start.
Can't tell from your pics if this is the issue. See green wire section here:
http://www.e30zone.net/e30zonewiki/index.php/Engines_Troubleshoot
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Yes, those connectors go to the obc.
Its very strange that there is fuel and spark yet no start.
Is the idle control valve working/buzzing? With the ignition on?
Can you hear the injectors firing while cranking ?(rubber hose as a stethoscope works here)
Can you do a stomp test ?(as a quick easy check of the functionality of the TPS)
Its not uncommon to mix up the TPS and ICV connectors as well as the cylinder ID and crank sensor connectors under the diagnostic connector.
Was this car originally an automatic? And does it have any aftermarket alarm system?
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Issue I ran into with a friends e30 was the green wire and a bad immobilizer connection. Either make sure things are plugged in or bypassed.
Same symptoms: fuel, spark, good Dme, and no start.
Can't tell from your pics if this is the issue. See green wire section here:
http://www.e30zone.net/e30zonewiki/index.php/Engines_Troubleshoot
Where is the Imobilizer? That's the page I've been using to diagnose issues.
Yes, those connectors go to the obc.
Its very strange that there is fuel and spark yet no start.
Is the idle control valve working/buzzing? With the ignition on?
Can you hear the injectors firing while cranking ?(rubber hose as a stethoscope works here)
Can you do a stomp test ?(as a quick easy check of the functionality of the TPS)
Its not uncommon to mix up the TPS and ICV connectors as well as the cylinder ID and crank sensor connectors under the diagnostic connector.
Was this car originally an automatic? And does it have any aftermarket alarm system?
Icv works, tps and icv connectors are different so not mixed up. I've tried switching cylinder id and crank sensor plugs with no luck.
i haven't listened to the injectors or done a stomp test. Car is originally a manual and I believe those wires were cut for a alarm system that is no longer present.
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What about the locations of the plug wires on the distributor cap? Did you miff those up by chance?
I know I require quadruple checking mine whenever they are off
I'll double check those too, but even if they were mixed up the car would misfire. The motor hasn't coughed one bit from cranking.
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Are the injectors themselves any good? Clogged injectors caused this problem for me on my 911, which also ran on Motronic.
Not sure, I do have a spare set that I could try but it's something with the wiring because I can't crank the car by jumping pins 11&14 from the diagnostic port.
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On his the immobilizer was a black thin rectangular box on the drivers side under the dash with the green wire plug going into it, but his was a gutted and rewired race car so probably relocated and an earlier model than yours...so not much help. Sorry about that.
You keep on mentioning you have fuel, but is this just power to the relay, the new pump, and injectors or have you also actually checked fuel pressure?
This is also helpful to track down issues: http://blog.bavauto.com/3562/no-start-1989-325i-e30/
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pulled these injectors out of the motor. Pulled the fuel rail/injectors off the old motor and plugged it into the harness for testing. Verified 70psi of fuel pressure before the FPR. Cranked the car and fuel sprayed but it wasn't a constant mist, I could just see droplets although they were firing upside down. Again verified that the injector harness has power and pulsing so that means everything ecu wise works?
After doing some reading next logical step would be to check impedance on the injectors? I'd like to hook the original set up to the motor too to see if they spray fuel any better. Any way of testing the FPR too? Also thinking it might be best to drain the fuel tank of year old gas to rule that out too.
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Get fresh gas for sure, especially if it has any ethanol. The fpr is just a relief valve, so if you measure the right pressure at the rail it is working. Low pressure means it is leaking by or weak, high pressure could be from some clog on the return side.
Sent from my 831C using Tapatalk
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Having moved to a new shop in July, This car hasn't had any attention between our schedules but we gave things another go yesterday and the car has started! Comparing notes between e30's it's seems to have been a combination of wiring issues and the fuel pressure regulator being bad. Don't really have a clear answer but the fpr was leaking this time after we re-wired the motor as we had planned to pull it for a m50.
@MattY bought a sedan (build thread will start soon) so just need to tidy up stuff under the car like installing the driveshaft, exhaust, subframe bushings being the major things before this is road worthy.
*knocks on wood* this will be at the picnic, hopefully the sedan too.
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Does anyone else miss the suburban?
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M50 swap it
the prophecy was set in stone and i am here to fufill it
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will be great to see it, calypso is an awesome color.
Dan
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Does anyone else miss the suburban?
I'm actually trying to find a decent turbo diesel truck myself the difference is I'll have a running BMW to take to events.
BMWCCA #499464
Current - 1995 540i/6 V 2.0 | Dead - 1995 540i/6 | Sold - 1995 318is
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