87 Bonneville EGR Code
#1
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87 Bonneville EGR Code
My 87 LE runs great, but after 20 mins of driving each day, the 'check engine' light comes on. Code reader says it'* the EGR, but the car just passed the 'Air Care' test here in British Columbia.
I get about 350km per tank in mostly city driving, but sometimes when at idle, the exhaust smells somewhat like paint thinner.
Anyone know if this is a big issue? Thank you.
I get about 350km per tank in mostly city driving, but sometimes when at idle, the exhaust smells somewhat like paint thinner.
Anyone know if this is a big issue? Thank you.
#2
Since you have the older 3.8 LG3, you will have a vacuum powered EGR valve. If you can, pull the vacuum hose on the top of the EGR valve (its the round thing behind the throttle body), and up under the valve you will feel something similar to a bellows. Press that up into the valve, and put your finger over the vacuum line fitting. It should hold the vacuum. If not, it needs replaced. Sorry if the instructions seem confusing, as I have never worked with that particular 3.8. If it does hold the vacuum, check your vacuum lines, if they are ok, you will most likely need to clean the passages under the valve or replace the solenoid for it.
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Thank you William
I appreciate your help, and I will do as you suggest.
Do you think that would account for the strange exhaust smell? Also, is 350km / 220miles per tank a pathetic gas mileage number?
Do you think that would account for the strange exhaust smell? Also, is 350km / 220miles per tank a pathetic gas mileage number?
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Is there a vacuum powered EGR on my .89 SSE?
Anyone know where all the shortwords are? Like EGR =) I know its a list somewhere on the forum.
//kisen
Anyone know where all the shortwords are? Like EGR =) I know its a list somewhere on the forum.
//kisen
#7
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The EGR on the 87 is controlled with vacume, but its done with a solenoid.... I have seen either or go bad..
Check the EGR first..
For the other post,
EGR is Exhaust Gas Recirculation
and no, you have a Digital EGR... Totally Electrical
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Check the EGR first..
For the other post,
EGR is Exhaust Gas Recirculation
and no, you have a Digital EGR... Totally Electrical
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#8
definitely check your maintenance schedule. she probably just needs a tune up, my friend'* old 87 used to avg about 24 mpg, your mileage is definitely not lookin good. Definitely do one if you don't know when the last time one was done. Low cost solution to bad fuel economy.
#9
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These LG3'* had a lot of EGR and MAF issues... Most likely needs an O2 sensor as well
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Originally Posted by jr's3800
These LG3'* had a lot of EGR and MAF issues... Most likely needs an O2 sensor as well
On some of the other GM vac operated EGR valves, there'* a sensor on the base of the valve. Hot exaust gas passing through the open valve heats the sensor, closes the circuit, and tells the ECM that the EGR valve is actually functioning. If so, I'd check that wire as well for being burnt and blistered (no reading on the sensor due to an open circuit on the wire can trip an EGR code...at least it can on the 3rd gen F-body)