Date: Sun, 26 Aug 2012 08:45:36 -0500
Reply-To: George Laubach <skiplaubach@COMCAST.NET>
Sender: Vanagon Mailing List <vanagon@gerry.vanagon.com>
From: George Laubach <skiplaubach@COMCAST.NET>
Subject: Re: Poor Hot Start Discovery - midway through solution
In-Reply-To: <BLU0-SMTP456D88518DD0C20B9F9E11DB8A30@phx.gbl>
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Thanks gentlemen.
'84 Digijet engine.
This morning. Bentley 24.32. Temp II analysis.
Engine 26C/79F 2,000 ohms (using analog ammeter). Engine starts immediately.
Drove 4 miles to warm engine.
Engine (@ thermostat/Temp II sensor) 82C/180F 220 ohms. Engine starts immediately.
Conclusion: Temp II operating satisfactorily.
Next step: run the heck out of the engine, get the temp up a bit more, see if I can recreate prior symptom (turns over & over, no ignition). Stay tuned.
Skip
Sent from my iPad
On Aug 26, 2012, at 7:47 AM, Jeff Palmer <Jpalmer@MYMTS.NET> wrote:
> Would a bad temp ii sensor also result in decreased gas mileage?
>
> Thanks
> Jeff
>
> Sent from my iPad
>
> On 2012-08-25, at 10:05 PM, Scott Daniel - Turbovans <scottdaniel@TURBOVANS.COM> wrote:
>
>> Ecu connection not likely to be an issue.
>> Check connections to Temp Sensor II very carefully.
>> I've seen that be 'it' before and it wasn't readily apparent.
>> Make sure you are using a high quality temp sensor II ,not a cheap one.
>> Is the throttle switch making contact at idle ? Very important.
>> just for fun, if you are using Premium fuel in that engine, try
>> mid-grade or regular.
>>
>> if it's 'normal flooding' ....gas pedal on the floor might help clean
>> itself out so it can fire up.
>> clutch pedal up or down should have no bearing.
>> it's easier on things to start with clutch pedal up and in neutral,
>> which I always recommend.
>> ( except in extreme cold ) .
>> I might also check into available voltage during cranking for EFI and
>> ignition.
>> I have seen that on n 84 wbxr ..but I have seen that on some vehicles
>> before ..
>> cranks very strongly ...but won't fire up easily.
>> if you ever see a case where just as you let off 'start' back to 'on'
>> and it fires up then ..
>> that is a sign that this syndrome is occurring. Have not seen in an 84
>> wbxr though.
>> VW also made the main battery cable considerable bigger in 86's and
>> later vanagons.
>> Never hurts to check all the grounds ..
>> they corrode over time, and are often not considered.
>>
>>
>>
>> On 8/25/2012 7:48 PM, Skip wrote:
>>> I posted this on thesamba.com without any response. It seems like this family is more "problem-solving" focused, which is far more interesting. I may have my hypothesis all wrong here, and will do more investigative fun tomorrow. Thanks for any wisdom that may be offered on this one. Skip
>>>
>>>
>>> Another "start phenomena" that I'm working through is the "hot start" issue, turns over and doesn't ignite. I've concluded that, when hot, the engine gets too much fuel, therefore is "flooded" and just turns over and over.
>>>
>>> Midway through the solution I discovered that if I depressed the clutch, keep it in second or first, depress the accelerator, after turning over a lot, it would start. Didn't always work. BTW, just tried the "release the EB" trick and that seemed to work (one data point). Why?
>>>
>>> Then last night, I drove 6 miles into town, bought some ice cream, etc., went to start the Westy, and it just turned over and over, no start. Then, drawing from a dusty memory of a Samba post, I opened the engine cover and removed the fuel inj. connectors (three of four, #1 is not easily reachable under the air intake). Then, the engine started immediately and, of course, died soon after. Too much fuel theory confirmed?
>>>
>>> I reconnected the (fuel injector) connectors and the engine started immediately.
>>>
>>> So, my conclusion is that the Temp II sensor is telling the ECU that the engine is cold (even when it's hot), therefore too much fuel is being dumped on the pistons. It's a new Temp II sensor, so I'll put in the old one and see if there's a difference (you know what they (we) say about new parts...)
>>>
>>> However, I s'pose it's possible that the Temp II sensor is fine and that my ECU is not signaling correctly. Or...maybe it's not the ECU, but maybe it's the connector to the ECU? So, it's time to dig deep with the volt/ammeter.
>>>
>>> What say you?
>>> _________________
>>> Skip
>>> 1984 Westy 1.9 case WBXR Manual (now with 2200cc GoWesty kit)
>>> Since 26 July 2011
>>>
>>
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