Non-keratinized squamous epithelial cells. 1  They are formed in the farthest part of urethra or vagina. 2  They have small nuclei and are larger than transitional cells. 3  They have one or more flat border. 4  They can be formed in any shape but are generally found to be round.
The average cost for an egr valve replacement is between $160 to $242. Labor costs are estimated between $74 to $94 while parts are priced between $86 to $148. Get a personalized estimate based on your location and specific car. Estimate does not include taxes and fees.
To test the EGR valve: Remove the vacuum line to the valve and install a manual vacuum pump. Start the engine and apply vacuum to the valve. If the engine idle speed drops, the EGR valve is working. If the engine idle speed does not change, the EGR system is not working.