Question about 1998 Volvo S70

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98 S70 cold start

It starts good when it is a warm day and when the temp goes below 50f it is hard to start I have change the temp sensor. I am getting a check engine light and the code is a failing secondairy injector air pump.

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I'm guessing your car has over 100,000 miles, right?

Hi, I currently have a 98 V70 XC Cross Country that was throwing the secondary injector air pump code. I removed the pump (under the battery tray) and it was filled with water. This happens because the check valve sticks open and allows the exhaust water vapor to accumulate in the pump as the air pump is mounted lower than the check valve (located behind engine back by firewall)

If you locate your air pump, just put 12 volts dc to it from the battery to see if it comes on and winds'll sound like a jet engine taking off if everything is working. Run jumper wires from the battery posts down to the air pump connector.

I removed the pump and freed up the bearings, then drilled two small drain holes in the casing. Works fine now. Also removed the check valve and cleaned. Checked with a MityVac vacuum pump to make sure check valve diaphrapgm wasn't leaking. Okay, just dirty. Working fine now. Do a Google search on the Volvo secondary air injection pump and you will find good info on removing the pump and valve for repairs or cleaning. These air pumps are expensive, so try removing and fixing yours first. Volvo had a bad problem with water accumulating in these pumps. Most junk yards don't have any in stock due to the cost. Most have been removed by now.

My problem now with the wagon is excessive cranking when cold. When I first try to start it, it will crank for 7-8 seconds, then start. If I immediately shut it off and try to restart it, it restarts quickly every time. Wondering if I have a fuel pressure problem? Any thoughts?

Posted on Nov 30, 2008


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