rough start up

[Ed Fenwick]

Aloha Guys,

My wife's Jeep was spurting on a cold start, so I changed the Idle control valve. Now it starts better but not smoothly until about 30 seconds running. The valve came from Amazon. Could it be a bad one? Someone suggested that it may be a bad head gasket. Is there a test for anti freeze in the exhaust? It does seem to be loosing a slight bit of water!

Opinions are greatly appreciated. Ed

 

[EddieS'04]

If enough coolant gets into the exhaust. You will have white smoke.

As for the head gasket do a compression leak down test. Maybe you can save some $ if you can borrow one.

 

[mike burns 3]

There is a test for exhaust gases in the radiator. You can borrow the tester from advanced auto. You have to buy the chemical but its not expensive. Test is easy to do.

 

[Bob Floyd]

Disconnect the Battery for 10min and let it relearn with the new valve, its still using the old look up tables in the processor for start up

 

[Ed Fenwick]

Tks roamer, that is the cheapest, I'll try that first. I don't think that any exaust is getting to the radiator. The other way round.

God bless Ed

 

[Vic Sorlie]

Check for signs of coolant into crankcase: foamy substance under oil filler cap, residue on dipstick. If your oil level is increasing then coolant's going into the sump. A small amount of glycol can destroy the engine bearings very quickly, so don't wait. If you want to be sure, an oil analysis will confirm.

 

[EddieS'04]

A small amount of glycol can destroy the engine bearings very quickly

It sure will. I had a plymouth with a 318. The coolant passage thru the timing chain cover leaked. I fixed it. But 200miles latter I turned an insert.



Pulled the motor and did a complete rebuild. Back in the day when a reconditioned crank and bearings, gasket kit. My total cost was less than $150. I wonder what that would be today.

I dont pull motors anymore though. Last one was the 302 cobra(not stock). I installed in my '94 stang. The $$ involved I lost count..LOL Had over $10k extra in it.



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[Vic Sorlie]

Sharp car and mechanic too!

 

[EddieS'04]

Thanks Vic,

I miss that car. The buyer rolled it into a ditch 4months after he bought it. Knowing the hours and $$ I put in, hurt.

 

[scott degroot]

Whats the year, model and engine size of the Jeep in ? How many miles?