At 08:50 7/9/2004, Mike Ray wrote:
>Hi all any ideas what would common cause may show these symptoms:
>
>1. freeway deaccelaration at 60-70mph causes backfire.

If closed-throttle, throttle switch not closing or associated.  Injection
should shut off on deceleration above 1500 rpm.

>2. Coolant temp light blinking. Coolant level ok. Temp verified ok at
>factory AND aftermarket temp gauages. Maybe bad temp level sending unit
>but ironic I get the back firing too.

Pull the plug and short the pins -- if no blink, dirty pins on tank probe
or bad coolant mix.  If still blink, either control module or more likely
gauge internals or bad probe wiring/ground wire.

>Is the computer changing the spark curve based on the low coolant (false)
>condition and causing the back firing?

No, nobody cares about low coolant except the blinking light which actually
cares about overheating but the control module tricks it.

david

>Thanks for any ideas!
>
>Mikey
>`87 Westy Eeyore
>
>
>
>---------------------------------
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--
David Beierl - Providence RI USA -- http://pws.prserv.net/synergy/Vanagon/
'84 Westy "Dutiful Passage," '85 GL "Poor Relation"