check your fuel pressure and vacuum. could be the chts
NEED HeLP
1987 300zx VG30 n/a manual
I am having hesitation probplems and i cant figure it out. I replaced head gaskets plenums etc. replaced timing set iming 20 deg. btdc which is what it says is suppose to be. I have all new ngk spak plugs and wires.
Problem: When i start off in first i step on the gas and the car will hesitates for a few seconds putts and then accelerates normal also does it in second not so much when the car is warm any ideas
I am having hesitation probplems and i cant figure it out. I replaced head gaskets plenums etc. replaced timing set iming 20 deg. btdc which is what it says is suppose to be. I have all new ngk spak plugs and wires.
Problem: When i start off in first i step on the gas and the car will hesitates for a few seconds putts and then accelerates normal also does it in second not so much when the car is warm any ideas
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you know what the specs are on the fuel pressure and how i would check that ..... i will replace the the chts and see if that helps
i also took the vacumn off the top of the fuel pressure regulator and gave it gas and didnt notice any change is that normal !!!
No, it is not normal to terminate a sentence with three exclamation marks.waxdatas said:i also took the vacumn off the top of the fuel pressure regulator and gave it gas and didnt notice any change is that normal !!!
Removing the vac hose will usually make the engine run a bit richer.
Normal running fuel pressure is about 36-37psi with the vacuum hose off the FPR.
To check the fuel pressure, install a pressure gauge between the fuel filer and the fuel rail. There are probably web sites that show you how to do that.
If the CHTS or connection to it is open or short circuit, there would be an error recorded in the ECU.
The appropriate FSM will show you how to check.
http://www.xenonz31.com/reference.html
Thanks Will Check and get back with results
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