|
PV, 120 (Amazon), 1800 General Forum for the Volvo PV, 120 and 1800 cars |
Information |
|
ecu unit 1800EViews : 1494 Replies : 12Users Viewing This Thread : |
|
Thread Tools | Display Modes |
May 11th, 2018, 19:37 | #1 |
arcturus
Last Online: Apr 10th, 2024 08:21
Join Date: Mar 2006
Location: Sagres Portugal
|
ecu unit 1800E
An acquaintance here has been chasing his tail over a back firing engine. he has been "advised that it could be the ECU unit 0280000017. Wants to know if and where available Help
__________________
life's too short to drink bad wine |
May 15th, 2018, 16:04 | #2 |
New Member
Last Online: Sep 19th, 2022 11:01
Join Date: May 2010
Location: Sevenoaks
|
You can get those units serviced still via Bosch Classic service I think but it is often some other smaller issue like air leaks (e.g. the induction hose) or the TPS or the distributor trigger points.
I am absolutely not a mechanic (so could be talking rubbish) but I have had a few 1800e cars and have one now. The Throttle Position Sensor/Switch is a particular suspect (the black blob on the side of the plenum) often secured by an upper and lower screw. Rightly or wrongly, I have found very small clockwise or anticlockwise adjustments to this can solve poor running after loosening the top and lower securing screws. I am not sure how you rotate the TPS if there are 4 screws as I think there are on pre 72 cars. I have had a couple of TPSs re-built but, although the pcbs were replaced, the restorers often seem to bugger up the wipers in them. With ignition turned on (but engine not fired), check that you can hear 20 'tick/click' noises from the injectors as you manually turn the throttle cable. If you don't have 20 clicks, your car wont fire/run properly. Could also be the trigger points in the distributor. |
May 15th, 2018, 16:23 | #3 |
arcturus
Last Online: Apr 10th, 2024 08:21
Join Date: Mar 2006
Location: Sagres Portugal
|
Could you please clarify what and where the "plenum" is. Not aware of this term. Will be talking to the original poster later today.
__________________
life's too short to drink bad wine |
May 15th, 2018, 17:28 | #4 |
Master Member
Last Online: Jan 24th, 2022 17:08
Join Date: Nov 2008
Location: small village in the north of Germany
|
He mentioned the throttle part.
The plenum is the part of the inlet manifold. The bootle part. On the front the butterfly, to the side the runners to the head. Read carefully this https://oldtimer.tips/en/d-jetronic/66-introduction Every thing you need is writen down there from Volker aka Dr-Djet! Step by step you will find the fault I'm too fare away for bad luck D-jetronic isn't really difficult. You won't even need special tools. Only a multimeter and a gauge and a vacuum pump Good luck, Kay |
May 15th, 2018, 17:52 | #5 | |
Member
Last Online: Feb 17th, 2021 17:13
Join Date: Jun 2017
Location: LONDON
|
Back Fire
Quote:
I am of the opinion, it's nothing to do with the ECU. They hardly ever go wrong. Check basics first. New plug, point gap, timing, valve setting. My guess is that the timing isn't right. Ta Kassie |
|
May 15th, 2018, 20:25 | #6 |
Master Member
Last Online: Apr 14th, 2024 16:22
Join Date: Oct 2013
Location: Alberta
|
May have been mentioned, but the plug leads could be mis connected.
Have an 1800E myself , while my ECU continues to work, in all my reading I have the impression that if an ECU fails, its dead. Ditto on the old timer link, good info there. More links to info http://pcbunn.cacr.caltech.edu/jjb/P...D-Jetronic.pdf http://w107.pbworks.com/f/DJetronic.pdf http://volvo1800pictures.com/documen...lt_tracing.pdf Check also fuel pressure, maybe the cause of backfiring |
May 16th, 2018, 08:58 | #7 |
arcturus
Last Online: Apr 10th, 2024 08:21
Join Date: Mar 2006
Location: Sagres Portugal
|
Spoke to the guy yesterday' He said that his "mechanic" had removed the unit and it was covered in green mold inside! Hmm. It seems as though the car had been out of use for some time before he bought it. Just wish I had gotten my hands on it before his "mechanic" He has been in contact with Bosch for more info.
For my own personal education I must study K jets. never know when the knowledge might come in useful. personally I'm old fashioned and prefer carb's
__________________
life's too short to drink bad wine |
May 16th, 2018, 12:10 | #8 |
Premier Member
Last Online: Yesterday 21:14
Join Date: Jul 2007
Location: Connecticut, USA
|
arcturus;
I highly recommend the following book: Bosch Fuel Injection & Engine Management by Charles Probst, Published by Robert Bentley Publishers SB ISBN 0-8376-0300-5 Theory of operation, development, and practical troubleshooting information. An excellent reference for D-Jetronic, K-Jetronic and later vehicles. In the most basic terms, the D-Jet is an "open-loop control system" in that the analog control circuit (ECU) supports and takes inputs from the various sensors, decides on the proper fuel for operating conditions, then dispenses that based on the amount of time Injectors get their power pulse. Later, the Lambda sensor was developed so that the actual result of this complex calculation could be checked, by "sniffing" the exhaust. That made it a "closed-loop control system"...making the electronics digital, air-mass, multiple and preheated Lambda sensors, cats, are all further developments of this brilliant system...the book covers it all, including the Constant Injections System CIS, which is a mechanical variation...equally brilliant. See also: http://www.sw-em.com/bosch_d-jetronic_injection.htm I also recommend studying the Kerfoot circuit shown there and Anders theory of operation and waveforms (Linked), and the troubleshooting guide is also very good: http://volvo1800pictures.com/documen...lt_tracing.pdf Cheers |
May 16th, 2018, 23:08 | #9 |
Master Member
Last Online: Apr 14th, 2024 16:22
Join Date: Oct 2013
Location: Alberta
|
May be a long shot but some judicious cleaning of the mold by gently brushing it out, then something like contact cleaner might be an option. I have no idea if contact cleaner would be appropriate for this purpose, so if someone knows they could chime in.
|
May 17th, 2018, 05:30 | #10 | |
Premier Member
Last Online: Mar 20th, 2024 18:26
Join Date: Jan 2016
Location: Cross Country
|
Quote:
Always worth a try.
__________________
XC90 R-Design MY2009, Black Sapphire Metallic. HP-Sound, RSE, Nav, Tel, ParkingCam, BLIS, ParkingHeater, RestHeat, Removable Towbar, Summer: CRATUS 20x8 on Pirelli Scorpion Zeros 255/45, Winter: NEPTUNE 17x7 on Continental WinterContact 4x4 235/65. |
|
Currently Active Users Viewing This Thread: 1 (0 members and 1 guests) | |
Thread Tools | |
Display Modes | |
|
|