1999 prelude vtec p0131 that problem - Cars & Trucks

IN a car this old, the drain lines in the head for the oil might be plugged up. Check them and replace the valve cover gasket

you need to get a real code scanner and get the real trouble code, it sounds like a problem with your vtec soleniod, check your oil level for starters and let me know what the trouble code is

EGR valves themselves rarely fail. Many are vacuum operated, and with a honda, it is a mess of vacuum wires underhood. I would have the car checked for vacuum leaks, and what actually controls the vacuum to the EGR valve first. Don't replace unless your certain it is the valve. Might be a cheap fix. ; )

have your water pump checked

hope this is what you were looking for. let me know if you need more!

http://www.wiringdiagrams21.com/2008/08/07/honda-prelude-iv-92-96-electrical-wiring-diagram

ok lets break this down
Vtec= Variable Valve Timing and Lift Electronic Control

if you look on the the motor on the left side youll see 2 things the distributor and the vtec solenoid.. the vtec solenoidif the smaller of the 2 thats it m8 theres 2 wires running from it .. all vtec does is lift the cams on a high 3rd lobe :) rides in the middle of the 2 smaller cam's on a automatic it should pop around 5.200 rpms on a honda ecu thats not tuned.. also a exaust helps or a intake that produce a higher tone thats unmistakeable when vtec hits.. its a beautiful thing hit me up with any! honda stuff ive done swaps to my 92 prelude si 2.2l vtec and many more so i know a honda engine and wireing like theback of my hand

Possible speed sensor. I know the speed sensors are a problem with hondas. A new speed sensor is about $200 and can be easily replaced. It bolts to the top of the transmission on the firewall side. Do NOT buy an e-bay one. They are only about $30 but are junk

Try replacing Oxygen sensor (top of exhaust pipe just rear of engine; 22mm ring-spanner job after cutting wires); though normally comes up with Code 1 on the MIL, this is the right bunch of symptoms.

Intake valve clearance 0.15mm-0.19mm (6-7 thou); Exhaust clearance 0.17mm-0.21mm (7-8 thou). All measurments COLD engine. 2.2 VTEC Prelude engine 1992-1996, import and UK.

Sounds like you accidently pulled the thin wire from you starter motor. Look at the connections at the end of the solenoid, mounted on starter motor.The thick red wire is Battery + next to that connection is a smaller male push- on terminal, locate loose wire (thin) in the same area and reconnect to male push-on terminal on solenoid or check if earth cable between body/battery to engine wasnt removed in the process.Also some vehicles you have to engage the clutch before starting, check for a switch located on clutch pedal where master cylinder connects to clutch pedal (Is clutch switch mounted and wiring connected?)