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1990 Plymouth Acclaim Problems

HVAC air flow switching to defrost under heavy engine load

for the Plymouth Acclaim

The heating, ventilation and AC (HVAC) system may change to defrost mode under heavy engine load conditions when low engine vacuum is produced. This can often be corrected by installing an additional vacuum check valve with reservoir to help stabilize the vacuum supply to the HVAC system.

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Engine Oil Leaks

for the Plymouth Acclaim

On 4cylinder engines, engine oil leaks are common from the valve cover gasket, cam plug, and cylinder head gasket.

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Hesitation caused by plugged EGR back pressure tube

for the Plymouth Acclaim

A hesitation on acceleration may be caused by carbon build up on the EGR valve back pressure tube. Cleaning the tube will generally restore proper EGR system operation, eliminating the associated hesitation.

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Driveability concerns due to intake valve deposits

for the Plymouth Acclaim

Various driveability concerns can be caused by deposits on the back of the intake valves. Fuel injector cleaner has shown reasonable results cleaning light deposits.

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Squeak type noise from front of vehicle when turning

for the Plymouth Acclaim

A squeak type noise may be noted from the front of the vehicle while turning. This is commonly caused by a faulty upper strut bearing. Replacing the failed strut bearing will generally correct this type of concern.

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