the car was hardstarting so i replaced the camshaft positioning sensor...

What is your question?

now the car bucks and surges but it starts fine now

Dec 3, 2011

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RepairPal Certified shops can diagnose and repair your 1990 Ford Thunderbird. They provide transparent pricing with a minimum 12-month or 12,000-mile warranty on repairs and services.

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What is your question?

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the car was hardstarting so i replaced the camshaft positioning sensor...

What is your question?

now the car bucks and surges but it starts fine now

bama07football in Oneonta AL

Dec 3, 2011

2 Replies

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PARTS GUYon Dec 3, 2011

Your check engine light must be on. What are the trouble codes?

bama07footballon Dec 4, 2011

there is no trouble codes check engine light is not on...it ran great before i changed the cps but it was hardstarting...i changed all the plugs,wires and coil...no vacuum leaks were detected...all the old plugs were evenly worn no oil on them..compression was good on all 6 cylinders...i unplugged the cps and now it runs good again but is hardstarting again...and i do run premium gas in it...is it possible i bought a defunct cps

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patrick mannionon Dec 3, 2011

Start with the basics, spark plugs good, no vacuum leaks,perhaps check compression is even in all cylinders, look at the old spark plugs see that they are all the same color, none are mechanically damaged or oil fouled.

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Popular Answer

What are the best Ford repair shops?

RepairPal Certified shops can diagnose and repair your 1990 Ford Thunderbird. They provide transparent pricing with a minimum 12-month or 12,000-mile warranty on repairs and services.